While Israel was encamped in that region, Reuben went and lay with Bilhah, his father’s concubine. When Israel heard of it, he was greatly offended. The sons of Jacob were now twelve.
This is the story of the family of Jacob. When Joseph was seventeen years old, he was tending the flocks with his brothers; he was an assistant to the sons of his father’s wives Bilhah and Zilpah, and Joseph brought their father bad reports about them.