Expression legō hymin / soi (I tell you in the mouth of Jesus) in the mouth of Jesus in the Gospels

(Translation from NRSV with a few modifications for a more literal meaning)

Matthew

3: 9Do not presume to say to yourselves, 'We have Abraham as our ancestor'; for I tell you (legō hymin), God is able from these stones to raise up children to Abraham.
5: 18For truly I tell you (legō hymin), until heaven and earth pass away, not one letter, not one stroke of a letter, will pass from the law until all is accomplished.
5: 20For I tell you (legō hymin), unless your righteousness exceeds that of the scribes and Pharisees, you will never enter the kingdom of heaven.
5: 22But I tell you (legō hymin) that if you are angry with a brother or sister, you will be liable to judgment; and if you insult a brother or sister, you will be liable to the council; and if you say, 'You fool,' you will be liable to the hell of fire.
5: 26Truly I tell you (legō soi), you will never get out until you have paid the last penny.
5: 28But I tell you (legō hymin) that everyone who looks at a woman with lust has already committed adultery with her in his heart.
5: 32But I tell you (legō hymin) that anyone who divorces his wife, except on the ground of unchastity, causes her to commit adultery; and whoever marries a divorced woman commits adultery.
5: 34But I tell you (legō hymin), Do not swear at all, either by heaven, for it is the throne of God,
5: 39But I tell you (legō hymin), Do not resist an evildoer. But if anyone strikes you on the right cheek, turn the other also;
5: 44But I tell you (legō hymin), Love your enemies and pray for those who persecute you,
6: 2"So whenever you give alms, do not sound a trumpet before you, as the hypocrites do in the synagogues and in the streets, so that they may be praised by others. Truly I tell you (legō hymin), they have received their reward.
6: 5"And whenever you pray, do not be like the hypocrites; for they love to stand and pray in the synagogues and at the street corners, so that they may be seen by others. Truly I tell you (legō hymin), they have received their reward.
6: 16"And whenever you fast, do not look dismal, like the hypocrites, for they disfigure their faces so as to show others that they are fasting. Truly I tell you (legō hymin), they have received their reward.
6: 25"Therefore I tell you (legō hymin), do not worry about your life, what you will eat or what you will drink, or about your body, what you will wear. Is not life more than food, and the body more than clothing?
6: 29yet I tell you (legō hymin), even Solomon in all his glory was not clothed like one of these.
8: 10When Jesus heard him, he was amazed and said to those who followed him, "Truly I tell you (legō hymin), in no one in Israel have I found such faith.
8: 11I tell you (legō hymin), many will come from east and west and will eat with Abraham and Isaac and Jacob in the kingdom of heaven,
10: 15Truly I tell you (legō hymin), it will be more tolerable for the land of Sodom and Gomorrah on the day of judgment than for that town.
10: 23When they persecute you in one town, flee to the next; for truly I tell you (legō hymin), you will not have gone through all the towns of Israel before the Son of Man comes.
10: 27What I tell you (legō hymin) in the dark, tell in the light; and what you hear whispered, proclaim from the housetops.
10: 42and whoever gives even a cup of cold water to one of these little ones in the name of a disciple - truly I tell you (legō hymin), none of these will lose their reward."
11: 9What then did you go out to see? A prophet? Yes, I tell you (legō hymin), and more than a prophet.
11: 11Truly I tell you (legō hymin), among those born of women no one has arisen greater than John the Baptist; yet the least in the kingdom of heaven is greater than he.
11: 22But I tell you (legō hymin), on the day of judgment it will be more tolerable for Tyre and Sidon than for you.
11: 24But I tell you (legō hymin) that on the day of judgment it will be more tolerable for the land of Sodom than for you."
12: 6I tell you (legō hymin), something greater than the temple is here.
12: 31Therefore I tell you (legō hymin), people will be forgiven for every sin and blasphemy, but blasphemy against the Spirit will not be forgiven.
12: 36I tell you (legō hymin), on the day of judgment you will have to give an account for every careless word you utter;
13: 17Truly I tell you (legō hymin), many prophets and righteous people longed to see what you see, but did not see it, and to hear what you hear, but did not hear it.
16: 28Truly I tell you (legō hymin), there are some standing here who will not taste death before they see the Son of Man coming in his kingdom."
17: 12but I tell you (legō hymin) that Elijah has already come, and they did not recognize him, but they did to him whatever they pleased. So also the Son of Man is about to suffer at their hands."
17: 20He said to them, "Because of your little faith. For truly I tell you (legō hymin), if you have faith the size of a mustard seed, you will say to this mountain, 'Move from here to there,' and it will move; and nothing will be impossible for you."
18: 3and said, "Truly I tell you (legō hymin), unless you change and become like children, you will never enter the kingdom of heaven.
18: 10"Take care that you do not despise one of these little ones; for, I tell you (legō hymin), in heaven their angels continually see the face of my Father in heaven.
18: 13And if he finds it, truly I tell you (legō hymin), he rejoices over it more than over the ninetynine that never went astray.
18: 18Truly I tell you (legō hymin), whatever you bind on earth will be bound in heaven, and whatever you loose on earth will be loosed in heaven.
18: 19Again, truly I tell you (legō hymin), if two of you agree on earth about anything you ask, it will be done for you by my Father in heaven.
18: 22Jesus said to him, "Not seven times, but, I tell you (legō soi), seventy seven times.
19: 9And I tell you (legō hymin), whoever divorces his wife, except for unchastity, and marries another commits adultery."
19: 23Then Jesus said to his disciples, "Truly I tell you (legō hymin), it will be hard for a rich person to enter the kingdom of heaven.
19: 24Again I tell you (legō hymin), it is easier for a camel to go through the eye of a needle than for someone who is rich to enter the kingdom of God."
19: 28Jesus said to them, "Truly I tell you (legō hymin), at the renewal of all things, when the Son of Man is seated on the throne of his glory, you who have followed me will also sit on twelve thrones, judging the twelve tribes of Israel.
21: 21Jesus answered them, "Truly I tell you (legō hymin), if you have faith and do not doubt, not only will you do what has been done to the fig tree, but even if you say to this mountain, 'Be lifted up and thrown into the sea,' it will be done.
21: 31Which of the two did the will of his father?" They said, "The first." Jesus said to them, "Truly I tell you (legō hymin), the tax collectors and the prostitutes are going into the kingdom of God ahead of you.
21: 43Therefore I tell you (legō hymin), the kingdom of God will be taken away from you and given to a people that produces the fruits of the kingdom.
23: 36Truly I tell you (legō hymin), all this will come upon this generation.
23: 39For I tell you (legō hymin), you will not see me again until you say, 'Blessed is the one who comes in the name of the Lord.'"
24: 2Then he asked them, "You see all these, do you not? Truly I tell you (legō hymin), not one stone will be left here upon another; all will be thrown down."
24: 34Truly I tell you (legō hymin), this generation will not pass away until all these things have taken place.
24: 47Truly I tell you (legō hymin), he will put that one in charge of all his possessions.
25: 12But he replied, 'Truly I tell you (legō hymin), I do not know you.'
25: 40And the king will answer them, 'Truly I tell you (legō hymin), just as you did it to one of the least of these who are members of my family, you did it to me.'
25: 45Then he will answer them, 'Truly I tell you (legō hymin), just as you did not do it to one of the least of these, you did not do it to me.'
26: 13Truly I tell you (legō hymin), wherever this good news is proclaimed in the whole world, what she has done will be told in remembrance of her."
26: 21and while they were eating, he said, "Truly I tell you (legō hymin), one of you will betray me."
26: 29I tell you (legō hymin), I will never again drink of this fruit of the vine until that day when I drink it new with you in my Father's kingdom."
26: 34Jesus said to him, "Truly I tell you (legō soi), this very night, before the cock crows, you will deny me three times."
26: 64Jesus said to him, "You have said so. But I tell you (legō hymin), From now on you will see the Son of Man seated at the right hand of Power and coming on the clouds of heaven."

Mark

2: 11"I tell you (legō soi), stand up, take your mat and go to your home."
3: 28"Truly I tell you (legō hymin), people will be forgiven for their sins and whatever blasphemies they utter;
5: 41He took her by the hand and said to her, "Talitha cum," which means, "Little girl, I tell you (legō soi), get up!"
8: 12And he sighed deeply in his spirit and said, "Why does this generation ask for a sign? Truly I tell you (legō hymin), no sign will be given to this generation."
9: 1And he said to them, "Truly I tell you (legō hymin), there are some standing here who will not taste death until they see that the kingdom of God has come with power."
9: 13But I tell you (legō hymin) that Elijah has come, and they did to him whatever they pleased, as it is written about him."
9: 41For truly I tell you (legō hymin), whoever gives you a cup of water to drink because you bear the name of Christ will by no means lose the reward.
10: 15Truly I tell you (legō hymin), whoever does not receive the kingdom of God as a little child will never enter it."
10: 29Jesus said, "Truly I tell you (legō hymin), there is no one who has left house or brothers or sisters or mother or father or children or fields, for my sake and for the sake of the good news,
11: 23Truly I tell you (legō hymin), if you say to this mountain, 'Be taken up and thrown into the sea,' and if you do not doubt in your heart, but believe that what you say will come to pass, it will be done for you.
11: 24So I tell you (legō hymin), whatever you ask for in prayer, believe that you have received it, and it will be yours.
12: 43Then he called his disciples and said to them, "Truly I tell you (legō hymin), this poor widow has put in more than all those who are contributing to the treasury.
13: 30Truly I tell you (legō hymin), this generation will not pass away until all these things have taken place.
13: 37And what I tell you (legō hymin) I say to all: Keep awake."
14: 9Truly I tell you (legō hymin), wherever the good news is proclaimed in the whole world, what she has done will be told in remembrance of her."
14: 18And when they had taken their places and were eating, Jesus said, "Truly I tell you (legō hymin), one of you will betray me, one who is eating with me."
14: 25Truly I tell you (legō hymin), I will never again drink of the fruit of the vine until that day when I drink it new in the kingdom of God."
14: 30Jesus said to him, "Truly I tell you (legō soi), this day, this very night, before the cock crows twice, you will deny me three times."

Luke

3: 8Bear fruits worthy of repentance. Do not begin to say to yourselves, 'We have Abraham as our ancestor'; for I tell you (legō hymin), God is able from these stones to raise up children to Abraham.
4: 24And he said, "Truly I tell you (legō hymin), no prophet is accepted in the prophet's hometown.
4: 25But in truth I tell you (legō hymin), there were many widows in Israel in the time of Elijah, when the heaven was shut up three years and six months, and there was a severe famine over all the land;
5: 24But so that you may know that the Son of Man has authority on earth to forgive sins" - he said to the one who was paralyzed - "I tell you (legō soi), stand up and take your bed and go to your home."
6: 27"But I tell you (legō hymin) that listen, Love your enemies, do good to those who hate you,
7: 9When Jesus heard this he was amazed at him, and turning to the crowd that followed him, he said, "I tell you (legō hymin), not even in Israel have I found such faith."
7: 14Then he came forward and touched the bier, and the bearers stood still. And he said, "Young man, I tell you (legō soi), rise!"
7: 26What then did you go out to see? A prophet? Yes, I tell you (legō hymin), and more than a prophet.
7: 28I tell you (legō hymin), among those born of women no one is greater than John; yet the least in the kingdom of God is greater than he."
7: 47Therefore, I tell you (legō soi), her sins, which were many, have been forgiven; hence she has shown great love. But the one to whom little is forgiven, loves little."
9: 27But truly I tell you (legō hymin), there are some standing here who will not taste death before they see the kingdom of God."
10: 12I tell you (legō hymin), on that day it will be more tolerable for Sodom than for that town.
10: 24For I tell you (legō hymin) that many prophets and kings desired to see what you see, but did not see it, and to hear what you hear, but did not hear it."
11: 8I tell you (legō hymin), even though he will not get up and give him anything because he is his friend, at least because of his persistence he will get up and give him whatever he needs.
11: 9"So I tell you (legō hymin), Ask, and it will be given you; search, and you will find; knock, and the door will be opened for you.
11: 51from the blood of Abel to the blood of Zechariah, who perished between the altar and the sanctuary. Yes, I tell you (legō hymin), it will be charged against this generation.
12: 4"I tell you (legō hymin), my friends, do not fear those who kill the body, and after that can do nothing more.
12: 5But I will warn you whom to fear: fear him who, after he has killed, has authority to cast into hell. Yes, I tell you (legō hymin), fear him!
12: 8"And I tell you (legō hymin), everyone who acknowledges me before others, the Son of Man also will acknowledge before the angels of God;
12: 22He said to his disciples, "Therefore I tell you (legō hymin), do not worry about your life, what you will eat, or about your body, what you will wear.
12: 27Consider the lilies, how they grow: they neither toil nor spin; yet I tell you (legō hymin), even Solomon in all his glory was not clothed like one of these.
12: 37Blessed are those slaves whom the master finds alert when he comes; truly I tell you (legō hymin), he will fasten his belt and have them sit down to eat, and he will come and serve them.
12: 44Truly I tell you (legō hymin), he will put that one in charge of all his possessions.
12: 51Do you think that I have come to bring peace to the earth? No, I tell you (legō hymin), but rather division!
12: 59I tell you (legō soi), you will never get out until you have paid the very last penny."
13: 3No, I tell you (legō hymin); but unless you repent, you will all perish as they did.
13: 5No, I tell you (legō hymin); but unless you repent, you will all perish just as they did."
13: 24"Strive to enter through the narrow door; for many, I tell you (legō hymin), will try to enter and will not be able.
13: 35See, your house is left to you. And I tell you (legō hymin), you will not see me until the time comes when you say, 'Blessed is the one who comes in the name of the Lord.'"
14: 24For I tell you (legō hymin), none of those who were invited will taste my dinner.'"
15: 7Just so, I tell you (legō hymin), there will be more joy in heaven over one sinner who repents than over ninety-nine righteous persons who need no repentance.
15: 10Just so, I tell you (legō hymin), there is joy in the presence of the angels of God over one sinner who repents."
16: 9And I tell you (legō hymin), make friends for yourselves by means of dishonest wealth so that when it is gone, they may welcome you into the eternal homes.
17: 34I tell you (legō hymin), on that night there will be two in one bed; one will be taken and the other left.
18: 8I tell you (legō hymin), he will quickly grant justice to them. And yet, when the Son of Man comes, will he find faith on earth?"
18: 14I tell you (legō hymin), this man went down to his home justified rather than the other; for all who exalt themselves will be humbled, but all who humble themselves will be exalted."
18: 17Truly I tell you (legō hymin), whoever does not receive the kingdom of God as a little child will never enter it."
18: 29And he said to them, "Truly I tell you (legō hymin), there is no one who has left house or wife or brothers or parents or children, for the sake of the kingdom of God,
19: 26'I tell you (legō hymin), to all those who have, more will be given; but from those who have nothing, even what they have will be taken away.
19: 40He answered, "I tell you (legō hymin), if these were silent, the stones would shout out."
21: 3He said, "Truly I tell you (legō hymin), this poor widow has put in more than all of them;
21: 32Truly I tell you (legō hymin), this generation will not pass away until all things have taken place.
22: 16for I tell you (legō hymin), I will not eat it until it is fulfilled in the kingdom of God."
22: 18for I tell you (legō hymin) that from now on I will not drink of the fruit of the vine until the kingdom of God comes."
22: 34Jesus said, "I tell you (legō soi), Peter, the cock will not crow this day, until you have denied three times that you know me."
22: 37For I tell you (legō hymin), this scripture must be fulfilled in me, 'And he was counted among the lawless'; and indeed what is written about me is being fulfilled."
23: 43He replied, "Truly I tell you (legō hymin), today you will be with me in Paradise."

John

1: 51And he said to him, "Very truly, I tell you (legō hymin), you will see heaven opened and the angels of God ascending and descending upon the Son of Man."
3: 3Jesus answered him, "Very truly, I tell you (legō soi), no one can see the kingdom of God without being born from above."
3: 5Jesus answered, "Very truly, I tell you (legō soi), no one can enter the kingdom of God without being born of water and Spirit.
3: 11"Very truly, I tell you (legō soi), we speak of what we know and testify to what we have seen; yet you do not receive our testimony.
4: 35Do you not say, 'Four months more, then comes the harvest'? But I tell you (legō hymin), look around you, and see how the fields are ripe for harvesting.
5: 19Jesus said to them, "Very truly, I tell you (legō hymin), the Son can do nothing on his own, but only what he sees the Father doing; for whatever the Father does, the Son does likewise.
5: 24Very truly, I tell you (legō hymin), anyone who hears my word and believes him who sent me has eternal life, and does not come under judgment, but has passed from death to life.
5: 25"Very truly, I tell you (legō hymin), the hour is coming, and is now here, when the dead will hear the voice of the Son of God, and those who hear will live.
6: 26Jesus answered them, "Very truly, I tell you (legō hymin), you are looking for me, not because you saw signs, but because you ate your fill of the loaves.
6: 32Then Jesus said to them, "Very truly, I tell you (legō hymin), it was not Moses who gave you the bread from heaven, but it is my Father who gives you the true bread from heaven.
6: 47Very truly, I tell you (legō hymin), whoever believes has eternal life.
6: 53So Jesus said to them, "Very truly, I tell you (legō hymin), unless you eat the flesh of the Son of Man and drink his blood, you have no life in you.
8: 34Jesus answered them, "Very truly, I tell you (legō hymin), everyone who commits sin is a slave to sin.
8: 51Very truly, I tell you (legō hymin), whoever keeps my word will never see death."
8: 58Jesus said to them, "Very truly, I tell you (legō hymin), before Abraham was, I am."
10: 1"Very truly, I tell you (legō hymin), anyone who does not enter the sheepfold by the gate but climbs in by another way is a thief and a bandit.
10: 7So again Jesus said to them, "Very truly, I tell you (legō hymin), I am the gate for the sheep.
12: 24Very truly, I tell you (legō hymin), unless a grain of wheat falls into the earth and dies, it remains just a single grain; but if it dies, it bears much fruit.
13: 16Very truly, I tell you (legō hymin), servants are not greater than their master, nor are messengers greater than the one who sent them.
13: 20Very truly, I tell you (legō hymin), whoever receives one whom I send receives me; and whoever receives me receives him who sent me."
13: 21After saying this Jesus was troubled in spirit, and declared, "Very truly, I tell you (legō hymin), one of you will betray me."
13: 38Jesus answered, "Will you lay down your life for me? Very truly, I tell you (legō soi), before the cock crows, you will have denied me three times.
14: 12Very truly, I tell you (legō hymin), the one who believes in me will also do the works that I do and, in fact, will do greater works than these, because I am going to the Father.
16: 20Very truly, I tell you (legō hymin), you will weep and mourn, but the world will rejoice; you will have pain, but your pain will turn into joy.
16: 23On that day you will ask nothing of me. Very truly, I tell you (legō hymin), if you ask anything of the Father in my name, he will give it to you.
21: 18Very truly, I tell you (legō soi), when you were younger, you used to fasten your own belt and to go wherever you wished. But when you grow old, you will stretch out your hands, and someone else will fasten a belt around you and take you where you do not wish to go."