2 Chronicles 23:2-6

2They went throughout Judah and gathered the Levites and the heads of Israelite families from all the towns. When they came to Jerusalem,

3the whole assembly made a covenant with the king at the temple of God. Jehoiada said to them, “The king’s son shall reign, as the Lord promised concerning the descendants of David.

4Now this is what you are to do: A third of you priests and Levites who are going on duty on the Sabbath are to keep watch at the doors,

5a third of you at the royal palace and a third at the Foundation Gate, and all the others are to be in the courtyards of the temple of the Lord.

6No one is to enter the temple of the Lord except the priests and Levites on duty; they may enter because they are consecrated, but all the others are to observe the Lord’s command not to enter.