Genesis

⁵And Bilhah conceived, and bare Jacob a son. ⁶And Rachel said, God hath judged me, and hath also heard my voice, and hath given me a son: therefore called she his name Dan. ⁷And Bilhah Rachel's handmaid conceived again, and bare Jacob a second son. ⁸And Rachel said, With mighty wrestlings have I wrestled with my sister, and have prevailed: and she called his name Naphtali. ⁹When Leah saw that she had left bearing, she took Zilpah her handmaid, and gave her to Jacob to wife. ¹⁰And Zilpah Leah's handmaid bare Jacob a son. ¹¹And Leah said, Fortunate! and she called his name Gad.