'Flock' in the Bible

But the hired man [who merely serves for wages], who is neither the shepherd nor the owner of the sheep, when he sees the wolf coming, deserts the flock and runs away; and the wolf snatches the sheep and scatters them.

I have other sheep [beside these] that are not of this fold. I must bring those also, and they will listen to My voice and pay attention to My call, and they will become one flock with one Shepherd.