Genesis 30:40

New International Version

Jacob set apart the young of the flock by themselves, but made the rest face the streaked and dark-colored animals that belonged to Laban. Thus he made separate flocks for himself and did not put them with Laban’s animals.

Cross References

Genesis 30:39

they mated in front of the branches. And they bore young that were streaked or speckled or spotted.

Genesis 30:41

Whenever the stronger females were in heat, Jacob would place the branches in the troughs in front of the animals so they would mate near the branches,