Genesis 30:31-33

So he said, “What shall I give you?” And Jacob said, “You shall not give me anything. If you will do this thing for me, I will again feed and keep your flocks: Let me pass through all your flock today, removing from there all the speckled and spotted sheep, and all the brown ones among the lambs, and the spotted and speckled among the goats; and these shall be my wages. So my righteousness will answer for me in time to come, when the subject of my wages comes before you: every one that is not speckled and spotted among the goats, and brown among the lambs, will be considered stolen, if it is with me.”