'Lambs' in the Bible

Abraham set seven ewe lambs of the flock by themselves.

Abimelech said to Abraham, "What do these seven ewe lambs which you have set by themselves mean?"

He said, "You shall take these seven ewe lambs from my hand, that it may be a witness to me, that I have dug this well."

Jacob separated the lambs, and set the faces of the flocks toward the streaked and all the black in the flock of Laban: and he put his own droves apart, and didn't put them into Laban's flock.