The prophet Gad said to David, Don't stay in the stronghold; depart, and get you into the land of Yehudah. Then David departed, and came into the forest of Cheret.
Now the acts of David the king, first and last, behold, they are written in the history of Shemu'el the seer, and in the history of Natan the prophet, and in the history of Gad the seer,
He set the Levites in the house of the LORD with cymbals, with psalteries, and with harps, according to the mitzvah of David, and of Gad the king's seer, and Natan the prophet; for the mitzvah was of the LORD by his prophets.