2 Chronicles 23:6

But let no one enter the house of the Lord except the priests and the ministering Levites; they may enter, for they are holy. And let all the people keep the charge of the Lord.

1 Chronicles 23:28-32

For their office is to assist the sons of Aaron with the service of the house of the Lord, in the courts and in the chambers and in the purifying of all holy things, even the work of the service of the house of God,

2 Kings 11:6-7

(one third also shall be at the gate Sur, and one third at the gate behind the guards), shall keep watch over the house for defense.

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
(one third also shall be at the gate Sur, and one third at the gate behind the guards), shall keep watch over the house for defense.
1 Chronicles 23:28
For their office is to assist the sons of Aaron with the service of the house of the Lord, in the courts and in the chambers and in the purifying of all holy things, even the work of the service of the house of God,