Genesis 30:38

35 And he removed that day the he-goats that were ring-streaked and spotted, and all the she-goats that were speckled and spotted; every one that had [some] white in it, and all the brown among the sheep, and gave [them] into the hands of his sons.

36 And he set three days' journey between himself and Jacob: and Jacob fed the rest of Laban's flocks.

37 And Jacob took to him rods of green poplar, and of the hazel and chesnut-tree; and peeled white streaks in them, and made the white appear which [was] in the rods.

38 And he set the rods, which he had peeled, before the flocks in the gutters in the watering-troughs, when the flocks came to drink, that they should conceive when they came to drink.

39 And the flocks conceived before the rods, and brought forth cattle ring-streaked, speckled, and spotted.

40 And Jacob separated the lambs, and set the faces of the flocks towards the ring-streaked, and all the brown in the flock of Laban: and he put his own flocks by themselves, and put them not with Laban's cattle.

41 And it came to pass, whenever the stronger cattle conceived, that Jacob laid the rods before the eyes of the cattle in the gutters, that they might conceive among the rods.