Nehemiah 12:45
They carried out their service obligations to their God and their service obligations of purification according to what David and his son Solomon had commanded.
1 Chronicles 25:1-26
Along with officers in his army, David consecrated to assist in service to the descendants of Asaph, Heman, and Jeduthun those who prophesy with lyres, harps, and cymbals.
1 Chronicles 23:28
David issued these orders:
2 Chronicles 23:6
Nobody is to enter the LORD's Temple except for the priests and descendants of Levi who are on duty. They may enter because they are ceremonially holy, but all the rest of the people must observe the LORD's instructions.