Genesis 30:8-12

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

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

And Zilpah Leah’s maid bare Jacob a son.

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

And Zilpah Leah’s maid bare Jacob a second son.