Genesis 30:41-43

41Moreover, whenever the 1stronger of the flock 2were mating, Jacob would place the rods in the sight of the flock in the gutters, so that they might 3mate by the rods;

42but when the flock was feeble, he did not put them in; so the feebler were Laban’s and the 4stronger Jacob’s.

43So 5the man 6became exceedingly prosperous, and had large flocks and female and male servants and camels and donkeys.