2 Chronicles 23:4-6

Modern English Version

⁴ And this is the thing that you all will do: A third of you all from the priests and Levites who come on the Sabbath will be gatekeepers, ⁵ one-third will be at the palace of the king and another third at the Foundation Gate. And all the people will be in the courts of the house of the Lord. ⁶ And may no one enter the house of the Lord except the priests and those Levites who are serving. Those can enter because they are holy, but all the people will keep their assigned duty of the Lord.