2 Samuel 16:21-22

21Ahithophel said to Absalom, “1Have relations with your father’s concubines, whom he has left behind to take care of the house; then all Israel will hear that you have made yourself repulsive to your father. The hands of all who are with you will also be strengthened.”

22So they pitched a tent for Absalom on the roof, 2and Absalom had relations with his father’s concubines 3in the sight of all Israel.