3Then she said, “Here is my maidservant Bilhah. Sleep with her, that she may bear children for me, 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.
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.
— Genesis 30:3-8