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.
So Rachel gave Jacob her servant Bilhah as a wife, and he slept with her, ... When Leah saw that she had stopped having children, she gave her servant Zilpah to Jacob as a wife.
While Israel was living in that region, Reuben went in and slept with his father’s concubine Bilhah, and Israel heard about it. Jacob had twelve sons: ... The sons of Rachel’s maidservant Bilhah were Dan and Naphtali. And the sons of Leah’s maidservant Zilpah were Gad and Asher. These are the sons of Jacob, who were born to him in Paddan-aram.
Now Eli was very old, and he heard about everything his sons were doing to all Israel and how they were sleeping with the women who served at the entrance to the Tent of Meeting. “Why are you doing these things?” Eli said to his sons. “I hear about your wicked deeds from all these people. No, my sons; it is not a good report I hear circulating among the LORD’s people.