Genesis 30:10

⁸  And Rachel said, With great wrestlings have I wrestled with my sister, and I have prevailed: and she called his name Naphtali.

⁹  When Leah saw that she had left bearing, she took Zilpah her maid, and gave her Jacob to wife.

¹⁰  And Zilpah Leah's maid bare Jacob a son.

¹¹  And Leah said, A troop cometh: and she called his name Gad.

¹²  And Zilpah Leah's maid bare Jacob a second son.