Genesis 30:31-32

31Laban asked, “What should I give you?” And Jacob said, “You don’t need to give me anything. If you do this one thing for me, I will continue to shepherd and keep your flock.

32Let me go through all your sheep today and remove every sheep that is speckled or spotted, every dark-colored sheep among the lambs, and the spotted and speckled among the female goats. Such will be my wages.