Genesis 30:3-9

3Then she said, “Here is my maidservant Bilhah. Sleep with her, that she may bear children for me,1 so that through her I too can build a family.”

4So Rachel gave Jacob her servant Bilhah as a wife, and he slept with her, 5and Bilhah conceived and bore him a son. 6Then Rachel said, “God has vindicated me; He has heard my plea and given me a son.” So she named him Dan.2

7And Rachel’s servant Bilhah conceived again and bore Jacob a second son. 8Then Rachel said, “In my great struggles, I have wrestled with my sister and won.” So she named him Naphtali.3

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