Genesis 30:39-41

Complete Jewish Bible

³⁹ the animals mated in sight of the rods and gave birth to streaked, speckled and spotted young. ⁴⁰ Ya‘akov divided the lambs and had the animals mate with the streaked and the brown in the flock of Lavan. He also kept his own livestock separate and did not have them mix with Lavan’s flock. ⁴¹ Whenever the hardier animals came into heat, Ya‘akov would set up the rods in the watering troughs; so that the animals would see them and conceive in front of them;