King David’s accomplishments, from start to finish, are recorded in the Annals of Samuel the prophet, the Annals of Nathan the prophet, and the Annals of Gad the prophet.
King Hezekiah stationed the Levites in the Lord’s temple with cymbals and stringed instruments, just as David, Gad the king’s prophet, and Nathan the prophet had ordered. (The Lord had actually given these orders through his prophets.)