Genesis 30:32

I will pass through all thy flock today, removing from thence all the speckled and spotted cattle, and all the brown cattle among the sheep, and the spotted and speckled among the goats; and of such shall be my hire. The terms of this contract were based upon the fact that the goats in the Orient are usually black or dark-brown, seldom white or speckled with white, the sheep on the contrary usually white, seldom black or speckled. The proposition, therefore, seemed to be very one-sided in favor of Laban.