Genesis 37:2

These are the generations of Jacob; the remainder of the book is devoted to the history of Jacob and his family. Joseph, being seventeen years old, was feeding the flock with his brethren; having reached this age, he was considered strong enough to serve, with the rest, as a shepherd-boy. And the lad was with the sons of Bilhah and with the sons of Zilpah, his father's wives, since the sons of his mother's hand-maid and those of Leah's servant stood nearer to him than the sons of Leah. And Joseph brought unto his father their evil report. He was not an idle, conceited tale-bearer, but he did his duty in informing his father when, evil reports concerning his brothers became persistent, when they had given offense to him and to others by their wickedness.