'Mandrakes' in the Bible

At the time of the wheat harvest Reuben went out and found some mandrake plants in a field and brought them to his mother Leah. Rachel said to Leah, "Give me some of your son's mandrakes."

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."

When Jacob came in from the fields that evening, Leah went out to meet him and said, "You must sleep with me because I have paid for your services with my son's mandrakes." So he had marital relations with her that night.