Genesis 30:40

New American Bible - revised edition

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.

Cross References

Genesis 30:39

the goats mated by the shoots, and so they gave birth to streaked, speckled and spotted young.

Genesis 30:41

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;