Numbers 18:3

They are to perform duties for you and for the whole tent. They must not come near the sanctuary equipment or the altar; otherwise, both they and you will die.

Numbers 4:15

“Aaron and his sons are to finish covering the holy objects and all their equipment whenever the camp is to move on. The Kohathites will come and carry them, but they are not to touch the holy objects or they will die. These are the transportation duties of the Kohathites regarding the tent of meeting.

Numbers 3:25

The Gershonites’ duties at the tent of meeting involved the tabernacle, the tent, its covering, the screen for the entrance to the tent of meeting,

Numbers 3:31

Their duties involved the ark, the table, the lampstand, the altars, the sanctuary utensils that were used with these, and the screen—and all the work relating to them.

Numbers 3:36

The assigned duties of Merari’s descendants involved the tabernacle’s supports, crossbars, posts, bases, all its equipment, and all the work related to these,

Numbers 4:19-20

Do this for them so that they may live and not die when they come near the most holy objects: Aaron and his sons are to go in and assign each man his task and transportation duty.

Numbers 16:40

just as the Lord commanded him through Moses. It was to be a reminder for the Israelites that no unauthorized person outside the lineage of Aaron should approach to offer incense before the Lord and become like Korah and his followers.

Numbers 1:51

Whenever the tabernacle is to move, the Levites are to take it down, and whenever it is to stop at a campsite, the Levites are to set it up. Any unauthorized person who comes near it must be put to death.

Numbers 18:7

But you and your sons will carry out your priestly responsibilities for everything concerning the altar and for what is inside the veil, and you will do that work. I am giving you the work of the priesthood as a gift, but an unauthorized person who comes near the sanctuary will be put to death.”

Treasury of Scripture Knowledge

Summary

Numbers 18:3

And they shall keep thy charge, and the charge of all the tabernacle: only they shall not come nigh the vessels of the sanctuary and the altar, that neither they, nor ye also, die.

Only they

Numbers 3:25

Numbers 4:19

Numbers 16:40

Neither

Numbers 4:15

General references

Hebrews 5:4

Bible References

Only they

The Gershonites’ duties at the tent of meeting involved the tabernacle, the tent, its covering, the screen for the entrance to the tent of meeting,

Do this for them so that they may live and not die when they come near the most holy objects: Aaron and his sons are to go in and assign each man his task and transportation duty.

just as the Lord commanded him through Moses. It was to be a reminder for the Israelites that no unauthorized person outside the lineage of Aaron should approach to offer incense before the Lord

and become like Korah and his followers.

Neither

General references

No one takes this honor on himself; instead, a person is called by God, just as Aaron was.