and prepare yourselves by the houses of your fathers, after 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 the LORD on the altar of the LORD, which he had built before the porch, that each thing might be offered in its day, according to the commandment of Moses, on the sabbaths and on the new moons and on the feasts three times in the year, that is in the feast of unleavened bread and in the feast of weeks and in the feast of the tabernacles. And he appointed, according to the order of David his father, the courses of the priests to their service and the Levites to their charges, to praise and minister before the priests, each thing in its day; the porters also by their courses at each 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 from the day of the foundation of the house of the LORD and until it was finished. So the house of the LORD was perfected.

And they kept the ward of their God and the ward of the purification, and the singers and the porters, according to the statute of David and of Solomon, his son.