2 Samuel 5:3-5

3So all the elders of Israel came to the king at Hebron, and King David 1made a covenant with them before the Lord at Hebron; then 2they anointed David king over Israel. 4David was 3thirty years old when he became king, and 4he reigned forty years. 5At Hebron 5he reigned over Judah seven years and six months, and in Jerusalem he reigned thirty-three years over all Israel and Judah.