2 Samuel 17:24-26

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.