Genesis 30:37-39

New Revised Standard Version, Anglicised

³⁷ Then Jacob took fresh rods of poplar and almond and plane, and peeled white streaks in them, exposing the white of the rods. ³⁸ He set the rods that he had peeled in front of the flocks in the troughs, that is, the watering-places, where the flocks came to drink. And since they bred when they came to drink, ³⁹ the flocks bred in front of the rods, and so the flocks produced young that were striped, speckled, and spotted.