Numbers 18:3
And the Levites shall attend to your duty [as assistants] and to the duties of all the tent (tabernacle); only they shall not approach the articles of the sanctuary and the altar, or both they and you will die.
Numbers 4:15
When Aaron and his sons have finished covering the sanctuary and all its furniture, as the camp sets out, after all that [is done, but not before], the sons of Kohath shall come to carry them [using the poles], so that they do not touch the holy things, and die. These are the things in the Tent of Meeting (tabernacle) which the sons of Kohath are to carry.
Numbers 3:25
Now the responsibilities of the sons of Gershon in the Tent of Meeting involved the tabernacle and the tent, its covering, and the curtain for the doorway of the Tent of Meeting,
Numbers 3:31
Now their responsibilities involved the ark, the table [on which the bread of the Presence was placed], the lampstand, the altars, the utensils of the sanctuary with which the priests minister, and the curtain, and all the service concerning them.
Numbers 3:36
Now the appointed responsibilities of the sons of Merari involved the frames of the tabernacle, its bars, its pillars, its sockets or bases, and all the equipment, and all the service concerning them,
Numbers 4:19-20
But deal with them in this way, so that they may live and not die when they approach the most holy things: Aaron and his sons shall go in and assign each of them to his [specific] work and to his load [to be carried on the march].
Numbers 16:40
as a reminder to the sons of Israel so that no layman—that is, one who is not of the descendants of Aaron should approach to offer incense before the Lord; so that he will not become like Korah and as his company—just as the Lord had said to him through Moses.
Numbers 1:51
When the tabernacle is to go forward, the Levites shall take it down; and when the tabernacle is to [be set up for] camp, the Levites shall set it up. But the layman (non-Levite) who approaches the tabernacle shall be put to death.
Numbers 18:7
Therefore you and your sons with you shall attend to your priesthood for everything concerning the altar [of burnt offering and the altar of incense] and [of the Holy of Holies] within the veil, and you are to serve. I am giving you the priesthood as a bestowed service, but the stranger (outsider, layman) who approaches shall be put to death.”