2 Chronicles 23:18-19

18Jehoiada now put the priests and Levites in charge of the Temple of the Lord, following all the directions given by David. He also commanded them to present burnt offerings to the Lord, as prescribed by the Law of Moses, and to sing and rejoice as David had instructed.

19He also stationed gatekeepers at the gates of the Lord’s Temple to keep out those who for any reason were ceremonially unclean.