And make yourselves ready in your divisions, by your families, as it is ordered in the writings of David, king of Israel, and of Solomon his son; Verse ConceptsWriting

Then Solomon made burned offerings to the Lord on the altar of the Lord which he had put up in front of the covered way, Offering every day what had been ordered by Moses, on the Sabbaths and at the new moon and at the regular feasts three times a year, that is at the feast of unleavened bread, the feast of weeks, and the feast of tents. And he gave the divisions of the priests their places for their work, as ordered by his father David, and to the Levites he gave their work of praise and waiting on the priests, to do what was needed day by day; and he gave the door-keepers their places in turn at every door; for so David, the man of God, had given orders. read more.
All the orders given by the king to the priests and Levites, in connection with any business or stores, were done with care. And all the work of Solomon was complete, from the day when he put the base of the Lord's house in position, till Solomon had come to the end of building the Lord's house.

And they kept the watch of their God, and were responsible for making things clean, and so did the music-makers and the door-keepers, as it was ordered by David and Solomon his son.