Genesis 30:37-39

New Revised Standard Version Catholic Edition

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.