Genesis 30:16, 18, 26, 28-29, 32-33

When Jacob came in from the field in the evening, Leah went out to meet him and said, “You must sleep with me [tonight], for I have in fact hired you with my son’s mandrakes.” So he slept with her that night.

Then Leah said, “God has given me my reward because I have given my maid to my husband.” So she named him Issachar.

Give me my wives and my children for whom I have served you, and let me go; for you know the work which I have done for you.”

He said, “Name your wages, and I will give it [to you].” Jacob answered him, “You know how I have served you and how your possessions, your cattle and sheep and goats, have fared with me.

Let me pass through your entire flock today, removing from it every speckled and spotted sheep and every dark or black one among the lambs and the spotted and speckled among the goats; and those shall be my wages. So my honesty will be evident for me later, when you come [for an accounting] concerning my wages. Every one that is not speckled and spotted among the goats and dark among the young lambs, if found with me, shall be considered stolen.”