Genesis 30:41

New American Bible - revised edition

Whenever the hardier animals were in heat, Jacob would set the shoots in the troughs in full view of these animals, so that they mated by the shoots;

Cross References

Genesis 30:38

The shoots that he had peeled he then set upright in the watering troughs where the animals came to drink, so that they would be in front of them. When the animals were in heat as they came to drink,

Genesis 30:40

The sheep, on the other hand, Jacob kept apart, and he made these animals face the streaked or completely dark animals of Laban. Thus he produced flocks of his own, which he did not put with Laban’s flock.

Genesis 30:42

but with the weaker animals he would not put the shoots there. So the feeble animals would go to Laban, but the hardy ones to Jacob.