Numbers 18:3
And let them wait upon thee and upon all the tabernacle: only let them not come nigh the holy vessels and the altar, that both they and ye also die not.
Numbers 4:15
"And when Aaron and his sons have made an end of covering the sanctuary and all things of the sanctuary, against that the host remove, then the sons of Kohath shall come in for to bear, and so let them not touch the sanctuary lest they die. And this is the charge of the sons of Kohath in the tabernacle of witness.
Numbers 3:25
And the office of the children of Gershon, in the tabernacle of witness, was the habitation and the tent with the covering thereof and the hanging of the door of the tabernacle of witness,
Numbers 3:31
and their office was to keep the ark, the table, the candlestick and the altar, and the holy vessels to minister with, and the veil with all that served thereto.
Numbers 3:36
And the office of the sons of Merari was the boards of the dwelling and the bars, pillars with the sockets thereof, and all the instruments thereof and all that served thereto:
Numbers 4:19-20
But thus do unto them that they may live and not die, when they go unto the most holy place. Aaron and his sons shall go in and put them, every man unto his service and unto his burden.
Numbers 16:40
to be a remembrance unto the children of Israel, that no stranger which is not of the seed of Aaron, come near to offer cense before the LORD, that he be not made like unto Korah and his company: as the LORD said unto him by the hand of Moses.
Numbers 1:51
And when the tabernacle goeth forth, the Levites shall take it down: and when the tabernacle is pitched, they shall set it up: for if any stranger come near, he shall die.
Numbers 18:7
And see that both thou and thy sons with thee take heed unto your priests' office, in all things that pertain unto the altar and within the veil. And see that ye serve, for I have given your priests' office unto you for a gift to do service: and the stranger that cometh nigh, shall die."