2 Chronicles 23:4-6

Darby Translation

⁴ This is the thing which ye shall do: a third part of you that come in on the sabbath, of the priests and of the Levites, shall be keepers of the doors;

⁵ and a third part shall be at the king's house; and a third part at the gate of the foundation; and all the people shall be in the courts of the house of Jehovah.

⁶ But let none come into the house of Jehovah except the priests and those of the Levites that do the service; they shall go in, for they are holy; but all the people shall keep the watch of Jehovah.