Genesis 30:29-33

But Jacob said to him, “You yourself know how I have served you and how your livestock have fared with me.

For you had little before I came, and it has increased to a multitude, and the Lord has blessed you wherever I turned. But now, when shall I provide for my own household also?”

So he said, “What shall I give you?” And Jacob said, “You shall not give me anything. If you will do this one thing for me, I will again pasture and keep your flock:

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

So my honesty will answer for me later, when you come concerning my wages. Every one that is not speckled or spotted among the goats, or black among the lambs, if found with me, will be considered stolen.”