Genesis 30:14-21

Now at the time of wheat harvest Reuben [the eldest child] went and found some mandrakes in the field, and brought them to his mother Leah. Then Rachel said to Leah, “Please give me some of your son’s mandrakes.” But Leah answered, “Is it a small thing that you have taken my husband? Would you take away my son’s mandrakes also?” So Rachel said, “Jacob shall sleep with you tonight in exchange for your son’s mandrakes.” 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. God listened and answered [the prayer of] Leah, and she conceived and gave birth to a fifth son for Jacob. Then Leah said, “God has given me my reward because I have given my maid to my husband.” So she named him Issachar. Leah conceived again and gave birth to a sixth son for Jacob. Then Leah said, “God has endowed me with a good [marriage] gift [for my husband]; now he will live with me [regarding me with honor as his wife], because I have given birth to six sons.” So she named him Zebulun. Afterward she gave birth to a daughter and named her Dinah.