Cross reference
Genesis 35:25
25 The sons of Bilhah, Rachel's servant: Dan and Naphtali;
Genesis 30:4-8
4 So she gave him her servant Bilhah as a wife, and Jacob went in to her.
5 And Bilhah became with child, and gave birth to a son.
6 Then Rachel said, God has been my judge, and has given ear to my voice, and has given me a son; so he was named Dan.
7 And again Bilhah, Rachel's servant, was with child, and gave birth to a second son.
8 And Rachel said, I have had a great fight with my sister, and I have overcome her: and she gave the child the name Naphtali.
Genesis 37:2
2 These are the generations of Jacob: Joseph, a boy seventeen years old, was looking after the flock, together with his brothers, the sons of Bilhah and Zilpah, his father's wives; and Joseph gave their father a bad account of them.
Genesis 46:23-25
23 And the son of Dan was Hushim.
24 And the sons of Naphtali: Jahzeel and Guni and Jezer and Shillem.
25 These were the children of Bilhah, whom Laban gave to his daughter Rachel, seven persons.