2 Samuel 5:4–5
4 David was thirty years old when he began to reign, and ahe reigned forty years. 5 aAt Hebron he reigned over Judah bseven years and six months, and at Jerusalem he reigned over all Israel and Judah thirty-three years.1
1 Kings 2:11
11 And the time that David reigned over Israel was jforty years. He reigned seven years in Hebron and thirty-three years in Jerusalem.