Genesis 30:38-40

Amplified Bible

³⁸ Then he set the branches which he had peeled in front of the flocks in the watering troughs, where the flocks came to drink; and they mated and conceived when they came to drink. ³⁹ So the flocks mated and conceived by the branches, and the flocks ^[a]gave birth to streaked, speckled, and spotted offspring. ⁴⁰ Jacob separated the lambs, and [as he had done with the peeled branches] he made the flocks face toward the streaked and all the dark or black in the [new] flock of Laban; and he put his own herds apart by themselves and did not put them [where they could breed] with Laban’s flock.