Genesis 30:42

But when the cattle were feeble, in the late fall, when the pasturage was no longer so good, he put them not in; so the feebler were Laban's, and the stronger Jacob's. Thus Jacob, with the blessing of God, Genesis 31:12, succeeded in obtaining some of the wages which were so richly due him for his many years of faithful service. He used all his business sagacity in beating his covetous uncle at his own game, but incidentally kept his word not to appropriate so much as one animal that did not belong to him.