Genesis 30:3-9

3Then Rachel told him, “Take my maid, Bilhah, and sleep with her. She will bear children for me, and through her I can have a family, too.”

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

5Bilhah became pregnant and presented him with a son.

6Rachel named him Dan, for she said, “God has vindicated me! He has heard my request and given me a son.”

7Then Bilhah became pregnant again and gave Jacob a second son.

8Rachel named him Naphtali, for she said, “I have struggled hard with my sister, and I’m winning!”

9Meanwhile, Leah realized that she wasn’t getting pregnant anymore, so she took her servant, Zilpah, and gave her to Jacob as a wife.