And prepare yourselves after your fathers houses by your courses, according to the writing of David king of Israel, and according to the writing of Solomon his son. Verse ConceptsWriting

Then Solomon offered burnt-offerings unto Jehovah on the altar of Jehovah, which he had built before the porch, even as the duty of every day required, offering according to the commandment of Moses, on the sabbaths, and on the new moons, and on the set feasts, three times in the year, even in the feast of unleavened bread, and in the feast of weeks, and in the feast of tabernacles. And he appointed, according to the ordinance of David his father, the courses of the priests to their service, and the Levites to their offices, to praise, and to minister before the priests, as the duty of every day required; the doorkeepers also by their courses at every gate: for so had David the man of God commanded. read more.
And they departed not from the commandment of the king unto the priests and Levites concerning any matter, or concerning the treasures. Now all the work of Solomon was prepared unto the day of the foundation of the house of Jehovah, and until it was finished.'so the house of Jehovah was completed.

And they kept the charge of their God, and the charge of the purification, and'so did the singers and the porters, according to the commandment of David, and of Solomon his son.