2 Samuel 17:25 (KJV)

And when Ahithophel saw that his counsel was not followed, he saddled his ass, and arose, and gat him home to his house, to his city, and put his household in order, and hanged himself, and died, and was buried in the sepulchre of his father.

Then David came to Mahanaim. And Absalom passed over Jordan, he and all the men of Israel with him.

And Absalom made Amasa captain of the host instead of Joab: which Amasa was a man’s son, whose name was Ithra an Israelite, that went in to Abigail the daughter of Nahash, sister to Zeruiah Joab’s mother.

So Israel and Absalom pitched in the land of Gilead.

And it came to pass, when David was come to Mahanaim, that Shobi the son of Nahash of Rabbah of the children of Ammon, and Machir the son of Ammiel of Lo–debar, and Barzillai the Gileadite of Rogelim,