Numeral adjective ennea (nine) in the Gospels-Acts

(Translation from NRSV)


Matthew

18: 12What do you think? If a shepherd has a hundred sheep, and one of them has gone astray, does he not leave the ninety-nine (ennea) on the mountains and go in search of the one that went astray?
18: 13And if he finds it, truly I tell you, he rejoices over it more than over the ninety-nine (ennea) that never went astray.

Luke

15: 4"Which one of you, having a hundred sheep and losing one of them, does not leave the ninety-nine (ennea) in the wilderness and go after the one that is lost until he finds it?
15: 7Just so, I tell you, there will be more joy in heaven over one sinner who repents than over ninety-nine (ennea) righteous persons who need no repentance.
17: 17Then Jesus asked, "Were not ten made clean? But the other nine (ennea), where are they?