Genesis 30:3-9

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.”

4So Rachel gave her slave Bilhah to Jacob as a wife, and he slept with her.

5Bilhah conceived and bore Jacob a son.

6Rachel said, “God has vindicated me; yes, he has heard me and given me a son,” so she named him Dan.

7Rachel’s slave Bilhah conceived again and bore Jacob a second son.

8Rachel said, “In my wrestlings with God, I have wrestled with my sister and won,” and she named him Naphtali.

9When Leah saw that she had stopped having children, she took her slave Zilpah and gave her to Jacob as a wife.