1 Chronicles 29:26-30

Thus David the son of Jesse reigned over all Israel. The time that he reigned over Israel was forty years; he reigned seven years in Hebron and thirty-three years in Jerusalem. He died in a good old age [his seventy-first year], full of days (satisfied), riches and honor. Solomon his son reigned in his place. Now the acts of King David, from first to last, are written in the chronicles (records) of Samuel the seer, in the chronicles of Nathan the prophet, and in the chronicles of Gad the seer, with [accounts of] all his reign, and his power, and the times and circumstances which came on him, on Israel, and on all the kingdoms of the [surrounding] lands.