and prepare yourselves by your fathers' houses, in your divisions, according to the writing of David king of Israel, and according to the writing of Solomon his son; Verse ConceptsWriting

Then Solomon offered up burnt-offerings to 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 at the set feasts, three times in the year, at the feast of unleavened bread, and at the feast of weeks, and at the feast of tabernacles. And he appointed, according to the ordinance of David his father, the divisions of the priests for their service, and the Levites for their charges, to praise and serve before the priests, as the duty of every day required; and the doorkeepers by their divisions at every gate: for such was the commandment of David the man of God; read more.
and they did not depart from the commandment of the king to the priests and the Levites concerning any matter, nor concerning the treasures. And all the work of Solomon was prepared, to the day of the foundation of the house of Jehovah and to its completion. So the house of Jehovah was finished.

And, with the singers and the doorkeepers, they kept the ward of their God, and the ward of the purification, according to the commandment of David and of Solomon his son.