Genesis

¹⁴And Reuben went in the days of wheat harvest, and found mandrakes in the field, and brought them unto his mother Leah. Then Rachel said to Leah, Give me, I pray thee, of thy son's mandrakes. ¹⁵And she said unto her, Is it a small matter that thou hast taken away my husband? and wouldest thou take away my son's mandrakes also? And Rachel said, Therefore he shall lie with thee to-night for thy son's mandrakes. ¹⁶And Jacob came from the field in the evening, and Leah went out to meet him, and said, Thou must come in unto me; for I have surely hired thee with my son's mandrakes. And he lay with her that night. ¹⁷And God hearkened unto Leah, and she conceived, and bare Jacob a fifth son. ¹⁸And Leah said, God hath given me my hire, because I gave my handmaid to my husband: and she called his name Issachar. ¹⁹And Leah conceived again, and bare a sixth son to Jacob. ²⁰And Leah said, God hath endowed me with a good dowry; now will my husband dwell with me, because I have borne him six sons: and she called his name Zebulun.