Genesis 30:3

30:3 And she said, Behold my maid Bilhah, go in unto her; and she shall bear upon my knees, that I may also have children by her.

Genesis 30:14-15

30:14 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. 30:15 And she said unto her, [Is it] a small matter that thou hast taken 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.

Genesis 30:22-24

30:22 And God remembered Rachel, and God hearkened to her, and opened her womb. 30:23 And she conceived, and bare a son; and said, God hath taken away my reproach: 30:24 And she called his name Joseph; and said, The LORD shall add to me another son.