2 Samuel 17:23-27

Now when Ahithophel saw that his advice had not been followed, he saddled his donkey and set out and went to his home, to his city, and set his house in order, and hanged himself; so he died and was buried in his father’s grave.

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

Absalom put Amasa in command of the army in place of Joab. Now Amasa was the son of a man whose name was Ithra the Israelite, who had relations with Abigail the daughter of Nahash, sister of Zeruiah, Joab’s mother.

And Israel and Absalom camped in the land of Gilead.

Now when David had come to Mahanaim, Shobi the son of Nahash from Rabbah of the sons of Ammon, Machir the son of Ammiel from Lo-debar, and Barzillai the Gileadite from Rogelim,