Genesis 30:35,36

Laban tried to cheat Jacob. He agreed to Jacob’s plan. (See verse 34.) Jacob would take as his wages all the sheep that were not white. And he would take all the goats that were not black. But Laban left only white sheep with Jacob. And he left only black goats. He removed the other goats. Laban’s sons looked after those at a long distance away from Jacob. Laban thought that white sheep would produce only white young sheep. And he thought that black goats would produce only black young goats. Therefore, Jacob would not have any animals as his wages.

v37 Then Jacob took fresh sticks from bushes. He removed part of the outsides of the sticks so that one could see the white insides. v38 He put these sticks at the place where the animals came to drink. And they mated when they came to drink. v39 Therefore the animals mated at the place where they could see the sticks. And the young animals that were born were stripey or spotty.

v40 Jacob separated the male animals. He brought the female animals to the male animals that were stripey or black. So he collected animals for himself and he did not put them with Laban’s animals.

v41 Whenever the stronger animals mated, Jacob put the sticks in front of the animals. So they mated where they could see the sticks. v42 But he did not put the sticks in front of the weaker animals. Then the weaker animals belonged to Laban and the stronger animals belonged to Jacob.

v43 So Jacob became very rich. He had sheep, goats, maids, servants, camels and *donkeys.