Matthew 18:12-14
"How does it seem to you, when a man has a hundred sheep and loses one of them? Will he not leave the ninety and nine on the hills, to go and search for the one that has strayed?
Luke 15:4
"Which one of you men, if he has a hundred sheep, and has lost one of them, does not leave the ninety and nine in the desert and go after the lost one until he finds it?
John 6:37
"Everyone whom the Father gives me will come to me; and him who comes to me I will never reject.
John 10:16
"I have other sheep also, which do not belong to this fold. I must bring them too, and they will listen to my voice, and they will become one flock, one shepherd.