Numbers 18:3

And they shall keep thy charge, and the charge of all the tent. Only they shall not come near to the vessels of the sanctuary and to the altar, that they not die, neither they, nor ye.

Numbers 4:15

And when Aaron and his sons have made an end of covering the sanctuary, and all the furniture of the sanctuary, as the camp is set forward, after that, the sons of Kohath shall come to bear it, but they shall not touch the sanctuar

Numbers 3:25

And the charge of the sons of Gershon in the tent of meeting shall be the tabernacle, and the tent, the covering of it, and the screen for the door of the tent of meeting,

Numbers 3:31

And their charge shall be the ark, and the table, and the candlestick, and the altars, and the vessels of the sanctuary with which they minister, and the screen, and all the service of it.

Numbers 3:36

And the appointed charge of the sons of Merari shall be the boards of the tabernacle, and the bars of it, and the pillars of it, and the sockets of it, and all the instruments of it, and all the service of it,

Numbers 4:19-20

but thus do to them, that they may live, and not die, when they approach to the most holy things. Aaron and his sons shall go in, and appoint for them each one to his service and to his burden,

Numbers 16:40

to be a memorial to the sons of Israel, to the end that no stranger, who is not of the seed of Aaron, come near to burn incense before LORD, that he not be as Korah, and as his company, as LORD spoke to him by Moses.

Numbers 1:51

And when the tabernacle sets forward, the Levites shall take it down, and when the tabernacle is to be pitched, the Levites shall set it up. And the stranger who comes near shall be put to death.

Numbers 18:7

And thou and thy sons with thee shall keep your priesthood for everything of the altar, and for that within the veil, and ye shall serve. I give you the priesthood as a service of gift. And the stranger who comes near shall be put

Treasury of Scripture Knowledge

Summary

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.

Neither

General references

Bible References

Only they

Numbers 3:25
And the charge of the sons of Gershon in the tent of meeting shall be the tabernacle, and the tent, the covering of it, and the screen for the door of the tent of meeting,
Numbers 4:19
but thus do to them, that they may live, and not die, when they approach to the most holy things. Aaron and his sons shall go in, and appoint for them each one to his service and to his burden,
Numbers 16:40
to be a memorial to the sons of Israel, to the end that no stranger, who is not of the seed of Aaron, come near to burn incense before LORD, that he not be as Korah, and as his company, as LORD spoke to him by Moses.

Neither

Numbers 4:15
And when Aaron and his sons have made an end of covering the sanctuary, and all the furniture of the sanctuary, as the camp is set forward, after that, the sons of Kohath shall come to bear it, but they shall not touch the sanctuar

General references

Hebrews 5:4
And not any man takes the honor to himself, but being called by God, just as also Aaron.