2 Samuel 16:21-22

Ahithophel said to Absalom, “Go in to 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 odious to your father. Then the hands of all who are with you will be strengthened [by your boldness and audacity].” So they pitched a tent for Absalom on the roof [of the king’s palace], and Absalom went in to his father’s concubines in the sight of all Israel. [2 Sam 12:11, 12]