Genesis 37:2

2These are the generations of Jacob.

Joseph, when he was seventeen years old, was shepherding the flock with his brothers [Dan, Naphtali, Gad, and Asher]; the boy was with the sons of Bilhah and Zilpah, his father’s [37:2 I.e. concubines (see note 22:24).secondary] wives; and Joseph brought back a bad report about them to their father.