And it came to pass, while Israel dwelt in that land, that Reuben went and lay with Bilhah his father's concubine: and Israel heard of it. Now the sons of Jacob were twelve:
These are the generations of Jacob. Joseph, being seventeen years old, was feeding the flock with his brethren; and he was a lad with the sons of Bilhah, and with the sons of Zilpah, his father's wives: and Joseph brought the evil report of them unto their father.