Gênesis 30:38

E colocou essas varas que ele havia descascado, diante do rebanho, nos bebedouros e nos canais de água, onde os rebanhos vinham para saciar a sede, e elas conceberam enquanto vinham a beber.

And he set the rods which he had pilled before the flocks in the gutters in the watering troughs when the flocks came to drink, that they should conceive when they came to drink.