'Ninety nine' in the Bible

And if he find it, verily I say unto you, he rejoiceth more on account of that, than of the ninety nine which went not astray.

saying, What man of you that hath an hundred sheep, and loseth one of them, doth not leave the ninety-nine in the field, and go after that which was lost, till he find it?

Thus, I tell you, there shall be joy in heaven over one repenting sinner, more than over ninety-nine righteous persons, that have no need of repentance.