Matthew 18:12-14
What think you? If a man have a hundred sheep, and one of them go astray, does he not leave the ninety-nine, and go into the mountains, and seek for that which has gone astray?
Luke 15:4
What man of you that has a hundred sheep, and loses one of them, does not leave the ninety-nine in the desert, and go after that which is lost, till he find it?
John 6:37
All that the Father gives me, will come to me; and him that comes to me, I will by no means cast out.
John 10:16
And other sheep I have, which are not of this fold; those, also, must I bring, and they will hear my voice: and there shall be one flock, one shepherd.