Numbers 1:51

“So you shall appoint Aaron and his sons that they may keep their priesthood, but the outsider who comes near shall be put to death.”

Now those who were to camp before the tabernacle eastward, before the tent of meeting toward the sunrise, are Moses and Aaron and his sons, keeping the responsibility of the sanctuary for the responsibility of the sons of Israel; but the outsider coming near was to be put to death.

“When Aaron and his sons have finished covering the holy objects and all the furnishings of the sanctuary, when the camp is to set out, after that the sons of Kohath shall come to carry them, so that they will not touch the holy objects and die. These are the things in the tent of meeting which the sons of Kohath are to carry.

as a memorial to the sons of Israel that no outsider who is not of the seed of Aaron should come near to burn incense before Yahweh; so that he will not become like Korah and his congregation—just as Yahweh had spoken to him by the hand of Moses.

“Everyone who comes near, who comes near to the tabernacle of Yahweh, must die. Are we to breathe our utter last?”

“And they shall thus keep your responsibility and the responsibility of all the tent, but they shall not come near to the furnishings of the sanctuary and the altar, so that neither they nor you will die.

“But you and your sons with you shall keep your priesthood in everything that concerns the altar and inside the veil, and you are to perform service. I am giving you the priesthood as a bestowed service, but the outsider who comes near shall be put to death.”

“And the sons of Israel shall not come near the tent of meeting again, or they will bear sin and die.