Genesis 30:3

30:3 She replied, “Here is my servant Bilhah! Have sexual relations with her so that she can bear children for me and I can have a family through her.”

Genesis 30:14-15

30:14 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.” 30:15 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.”

Genesis 30:22-24

30:22 Then God took note of Rachel. He paid attention to her and enabled her to become pregnant. 30:23 She became pregnant and gave birth to a son. Then she said, “God has taken away my shame.” 30:24 She named him Joseph, saying, “May the Lord give me yet another son.”