New Revised Standard Version
Now Saul had a concubine whose name was Rizpah daughter of Aiah. And Ishbaal said to Abner, “Why have you gone in to my father’s concubine?”

Contemporary English Version
He had even slept with a wife of Saul by the name of Rizpah the daughter of Aiah. But Saul's son Ishbosheth told Abner, "You shouldn't have slept with one of my father's wives!"

New American Bible
Now Saul had had a concubine, Rizpah, the daughter of Aiah. And Ishbaal, son of Saul, said to Abner, “Why have you slept with my father’s concubine?”

Douay-Rheims Bible
And Saul had a concubine named Respha, the daughter of Aia. And Isboseth said to Abner:

And Saul had a concubine named Respha, the daughter of Aia. And Isboseth said to Abner:

Rizpah

2 Samuel 21:8-11 So the king took the two sons of Respha the daughter of Aia, whom she bore to Saul, Armoni, and Miphiboseth: and the five sons of Michol the daughter of Saul, whom she bore to Hadriel the son of Berzellai, that was of Molathi: . . .

Wherefore.

gone in

2 Samuel 12:8 And gave thee thy master's house and thy master's wives into thy bosom, and gave thee the house of Israel and Juda: and if these things be little, I shall add far greater things unto thee.

2 Samuel 16:21,22 And Achitophel said to Absalom: Go in to the concubines of thy father, whom he hath left to keep the house: that when all Israel shall hear that thou hast disgraced thy father, their hands may be strengthened with thee. . . .

1 Kings 2:17,21,22 And he said I pray thee speak to king Solomon (for he cannot deny thee any thing) to give me Abisag, the Sunamitess, to wife. . . .