'Ninety nine' in the Bible

What think ye? if a man have a hundred sheep, and one of them hath gone astray, doth he not leave the ninetynine upon the mountains, and go and seek that which hath gone astray?

And if it happen that he find it, truly do I say to you, he rejoiceth over it more than over the ninetynine that did not go astray.

What man of you having a hundred sheep, if he lose one of them, doth not leave the ninetynine in the wilderness, and go after that which is lost, until he findeth it?

I say to you, that in like manner there will be joy in heaven over one sinner that repenteth, more than over ninetynine righteous men who have no need of repentance.