2 Samuel 2:11 KJV
And the time that David was king in Hebron over the house of Judah was seven years and six months.
2 Samuel 2:11, King James Version
In context
10 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.
11 And the time that David was king in Hebron over the house of Judah was seven years and six months.
12 And Abner the son of Ner, and the servants of Ish–bosheth the son of Saul, went out from Mahanaim to Gibeon.