2 Samuel 3:7

3:7 Now Saul had a concubine named Rizpah daughter of Aiah. Ish-bosheth said to Abner, “Why did you have sexual relations with my father’s concubine?”

2 Samuel 16:22

16:22 So they pitched a tent for Absalom on the roof, and Absalom had sex with his father’s concubines in the sight of all Israel.