Cross reference
Genesis 35:25
25 and the sons of Bilhah, Rachel's handmaid: Dan and Naphtali;
Genesis 30:4-8
4 And she gave him Bilhah her handmaid to wife: and Jacob went in unto her.
5 And Bilhah conceived, and bare Jacob a son.
6 And Rachel said, God hath judged me, and hath also heard my voice, and hath given me a son: therefore called she his name Dan.
7 And Bilhah Rachel's handmaid conceived again, and bare Jacob a second son.
8 And Rachel said, With mighty wrestlings have I wrestled with my sister, and have prevailed: and she called his name Naphtali.
Genesis 37:2
2 These are the generations of Jacob. Joseph, being seventeen years old, was feeding the flock with his brethren; and he was a lad with the sons of Bilhah, and with the sons of Zilpah, his father's wives: and Joseph brought the evil report of them unto their father.
Genesis 46:23-25
23 And the sons of Dan: Hushim.
24 And the sons of Naphtali: Jahzeel, and Guni, and Jezer, and Shillem.
25 These are the sons of Bilhah, whom Laban gave unto Rachel his daughter, and these she bare unto Jacob: all the souls were seven.