Genesis 30:14-15

And 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. And 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.