2 Samuel 2:8-10

But Abner the son of Ner, captain of Saul's host, took Ish-bosheth the son of Saul, and brought him over to Mahanaim; and made him king over Gilead, and over the Ashurites, and over Jezreel, and over Ephraim, and over Benjamin, and over all Israel. Ish-bosheth Saul's son was forty years old when he began to reign over Israel, and reigned two years. But the house of Judah followed David.