Genesis 30:41-43

41And 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; 42but when the sheep were feeble, he put [them] not in; so the feeble were Laban's, and the strong Jacob's. 43And the man increased very, very much, and had much cattle, and bondwomen, and bondmen, and camels, and asses.