2 Samuel 2:8-12

8Meanwhile, Abner son of Ner, the commander of Saul’s army, had taken Ish-Bosheth son of Saul and brought him over to Mahanaim. 9He made him king over Gilead, Ashuri and Jezreel, and also over Ephraim, Benjamin and all Israel. 10Ish-Bosheth son of Saul was forty years old when he became king over Israel, and he reigned two years. The tribe of Judah, however, remained loyal to David. 11The length of time David was king in Hebron over Judah was seven years and six months. 12Abner son of Ner, together with the men of Ish-Bosheth son of Saul, left Mahanaim and went to Gibeon.