Matthew 18:12-14
What do you think? If a man has a hundred sheep, and one of them has gone astray, does he not leave the ninety-nine and go to the mountains in search of the one that went astray?
Luke 15:4
"What man of you, having a hundred sheep, if he loses one of them, does not leave the ninety-nine in the wilderness, and go after the one which is lost until he finds it?
John 6:37
All that the Father gives me will come to me, and the one who comes to me I will by no means cast out.
John 10:16
And I have other sheep that are not of this fold; I must bring them also, and they will heed my voice. So there shall be one flock and one shepherd.