Genesis 30:1-3

1When Rachel saw that she was not bearing Jacob any children, she envied her sister. “Give me sons, or I will die!” she said to Jacob.

2Jacob became angry with Rachel and said, “Am I in the place of God? He has withheld offspring from you!”

3Then she said, “Here is my maid Bilhah. Go sleep with her, and she’ll bear children for me so that through her I too can build a family.”