Matthew 18:12-14
Tell me, if a man has a hundred sheep and one of them strays, will he not leave the ninety-nine sheep on the hills and go in search of the one that has strayed?
Luke 15:4
"Which of you with a hundred sheep, if he loses one, does not leave the ninety-nine in the desert and go after the lost one till he finds it?
John 6:37
All those will come to me who are the Father's gift to me, and never will I reject one of them;
John 10:16
I have other sheep, too, which do not belong to this fold; I must bring them also, and they will listen to my voice; so it will be one flock, one shepherd.