Genesis 30:31-34

31Laban asked, “What shall I give you?” Jacob replied, “You shall not give me anything. But if you will do this one thing for me [which I now propose], I will again pasture and keep your flock:

32Let me pass through your entire flock today, removing from it every speckled and spotted sheep and every dark or black one among the lambs and the spotted and speckled among the goats; and those shall be my wages.

33So my honesty will be evident for me later, when you come [for an accounting] concerning my wages. Every one that is not speckled and spotted among the goats and dark among the young lambs, if found with me, shall be considered stolen.”

34And Laban said, “Good! Let it be done as you say.”