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, and all Israel will hear that you have made yourself a stench to your father, and the hands of all who are with you will 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.