Saul's son Ish-bosheth was forty years old when he began to reign over Israel, and he reigned for two years. The house of Judah, however, followed David.

2 Samuel 2:8
Meanwhile, Abner son of Ner, the commander of Saul's army, took Saul's son Ish-bosheth, moved him to Mahanaim,

2 Samuel 2:9
and made him king over Gilead, Asher, Jezreel, Ephraim, and Benjamin--over all Israel.

2 Samuel 2:11
And the length of time that David was king in Hebron over the house of Judah was seven years and six months.

Ishbosheth 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.