2 Samuel 17:24-27

24David had arrived at Mahanaim by the time Absalom crossed the Jordan with all the men of Israel.

25Now Absalom had appointed Amasa over the army in Joab’s place. Amasa was the son of a man named Ithra the Israelite; Ithra had married Abigail daughter of Nahash. Abigail was a sister to Zeruiah, Joab’s mother.

26And Israel and Absalom camped in the land of Gilead.

27When David came to Mahanaim, Shobi son of Nahash from Rabbah of the Ammonites, Machir son of Ammiel from Lo-debar, and Barzillai the Gileadite from Rogelim