2 Samuel 5:3-5

New International Version - UK

³ When all the elders of Israel had come to King David at Hebron, the king made a covenant with them at Hebron before the Lord, and they anointed David king over Israel.

⁴ David was thirty years old when he became king, and he reigned for forty years. ⁵ In Hebron he reigned over Judah for seven years and six months, and in Jerusalem he reigned over all Israel and Judah for thirty-three years.