2 Samuel 3:6-7

6It came about while there was war between the house of Saul and the house of David that 1Abner was making himself strong in the house of Saul.

7Now Saul had a concubine whose name was 2Rizpah, the daughter of Aiah; and 3Ish-bosheth said to Abner, “Why have you gone in to my father’s concubine?”