2 Chronicles 23:6

But let none come into the house of Jehovah except the priests, and those of the Levites who minister. They shall go in, for they are holy. But all the people shall keep the watch of Jehovah.

1 Chronicles 23:28-32

because their office was to wait on the sons of Aaron for the service of the house of Jehovah, in the courts and in the chambers, and in the purifying of all holy things, and the work of the service of the house of God

2 Kings 11:6-7

And a third part shall be at the gate of Sur. And a third part at the gate behind the guard. And you shall keep the watch of the house, alternately.

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
And a third part shall be at the gate of Sur. And a third part at the gate behind the guard. And you shall keep the watch of the house, alternately.
1 Chronicles 23:28
because their office was to wait on the sons of Aaron for the service of the house of Jehovah, in the courts and in the chambers, and in the purifying of all holy things, and the work of the service of the house of God