Genesis 30:40-42

Darby Translation

⁴⁰ And Jacob separated the lambs, and set the faces of the flock toward the ringstraked, and all the brown in the flock of Laban; and he made himself separate flocks, and did not put them with Laban's flock.

⁴¹ And it came to pass whensoever the strong cattle were ardent, that Jacob laid the rods before the eyes of the flock in the gutters, that they might become ardent among the rods;

⁴² but when the sheep were feeble, he put [them] not in; so the feeble were Laban's, and the strong Jacob's.