Genesis 30:32-33

30:32 Let me walk among all your flocks today and remove from them every speckled or spotted sheep, every dark-colored lamb, and the spotted or speckled goats. These animals will be my wages. 30:33 My integrity will testify for me later on. When you come to verify that I’ve taken only the wages we agreed on, if I have in my possession any goat that is not speckled or spotted or any sheep that is not dark-colored, it will be considered stolen.”

Genesis 30:15

30:15 But Leah replied, “Wasn’t it enough that you’ve taken away my husband? Would you take away my son’s mandrakes too?” “All right,” Rachel said, “he may sleep with you tonight in exchange for your son’s mandrakes.”

Genesis 30:40

30:40 Jacob removed these lambs, but he made the rest of the flock face the streaked and completely dark-colored animals in Laban’s flock. So he made separate flocks for himself and did not mix them with Laban’s flocks.