Genesis 30:39-41

New King James Version

³⁹ So the flocks conceived before the rods, and the flocks brought forth streaked, speckled, and spotted. ⁴⁰ Then Jacob separated the lambs, and made the flocks face toward the streaked and all the brown in the flock of Laban; but he put his own flocks by themselves and did not put them with Laban’s flock.

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