Very truly, I tell you, anyone who does not enter the sheepfold by the gate but climbs in by another way is a thief and a bandit. The one who enters by the gate is the shepherd of the sheep...
John 10:11-18
I am the good shepherd. The good shepherd lays down his life for the sheep. The hired hand, who is not the shepherd and does not own the sheep, sees the wolf coming and leaves the sheep and runs away...
John 10:16
I have other sheep that do not belong to this fold. I must bring them also, and they will listen to my voice. So there will be one flock, one shepherd...