Genesis 30:37-39

Amplified Bible

³⁷ Then Jacob took branches of fresh poplar and almond and plane trees, and peeled white stripes in them, exposing the white in the branches. 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.