epei

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

Matthew

18: 32	Then his lord summoned him and said to him, 'You wicked slave! I forgave you all that debt since (epei) you pleaded with me.
21: 46	They wanted to arrest him, but they feared the crowds, since (epei) they regarded him as a prophet.
27: 6	But the chief priests, taking the pieces of silver, said, "It is not lawful to put them into the treasury, since (epei) they are blood money."

Mark

15: 42

When evening had come, and since (epei) it was the day of Preparation, that is, the day before the sabbath,

Luke

1: 34

Mary said to the angel, "How can this be, since (epei) I am a virgin?"

John

13: 29	Some thought that, since (epei) Judas had the common purse, Jesus was telling him, "Buy what we need for the festival"; or, that he should give something to the poor.
19: 31	Since (epei) it was the day of Preparation, the Jews did not want the bodies left on the cross during the sabbath, especially because that sabbath was a day of great solemnity. So they asked Pilate to have the legs of the crucified men broken and the bodies removed.