And prepare yourselves after your fathers' houses by 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 burnt-offerings to LORD on the altar of LORD, 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 feas And he appointed, according to the ordinance of David his father, the divisions 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, al read more.
And they did not departed from the commandment of the king to the priests and Levites concerning any matter, or concerning the treasures. Now all the work of Solomon was prepared from the day of the foundation of the house of LORD, and until it was finished. [So] the house of LORD was completed.

And they kept the charge of their God, and the charge of the purification, and [also] the singers and the porters, according to the commandment of David, and of Solomon his son.