2 Samuel 16:21; 2 Samuel 16:22

21 Ahithophel said to Absalom, "Go in to your father's concubines, whom he has left to keep the house; then all Israel will hear that you have made yourself odious to your father. The hands of all who are with you will also be strengthened."

22 So they pitched a tent for Absalom on the roof, and Absalom went in to his father's concubines in the sight of all Israel.