This is the account of Jacob. When Joseph was seventeen years old, he was tending the flock with his brothers, the sons of his father’s wives Bilhah and Zilpah, and he brought their father a bad report about them.
Jewish Publication Society of America Version (JPS1917) - Genesis 37:2 >These are the generations of Jacob. Joseph, being seventeen years old, was feeding the flock with his brethren, being still a lad even with the sons of Bilhah, and with the sons of Zilpah, his father's wives; and Joseph brought evil report of them unto their father.