Genesis 30:40-42

International Standard Version

⁴⁰ Jacob kept the lambs separate, facing the striped and entirely black ones that belonged to Laban’s flock. He set his own herd by itself and would not let them be with Laban’s flock. ⁴¹ Whenever the more vigorous of the flock came into heat, Jacob would place the branches in the troughs in front of the flock to make them mate by the branches.

⁴² But he didn’t put the branches in front of any of the feeble members of the flock. As a result, the feeble ones belonged to Laban, but the stronger ones belonged to Jacob.