2 Chronicles 23:6

But let no one come into the house of Yahweh, except the priests, and those who minister of the Levites. They shall come in, for they are holy, but all the people shall follow Yahweh's instructions.

1 Chronicles 23:28-32

For their office was to wait on the sons of Aaron for the service of the house of Yahweh, in the courts, and in the rooms, and in the purifying of all holy things, even the work of the service of the house of God;

2 Kings 11:6-7

A third part shall be at the gate Sur; and a third part at the gate behind the guard. So you shall keep the watch of the house, and be a barrier.

Treasury of Scripture Knowledge

Summary

But let none come into the house of the LORD, save the priests, and they that minister of the Levites; they shall go in, for they are holy: but all the people shall keep the watch of the LORD.

They that minister

Bible References

They that minister

2 Kings 11:6
A third part shall be at the gate Sur; and a third part at the gate behind the guard. So you shall keep the watch of the house, and be a barrier.
1 Chronicles 23:28
For their office was to wait on the sons of Aaron for the service of the house of Yahweh, in the courts, and in the rooms, and in the purifying of all holy things, even the work of the service of the house of God;