Bilangan 18:3

18:3 They must be responsible to care for you and to care for the entire tabernacle. However, they must not come near the furnishings of the sanctuary and the altar, or both they and you will die.

Bilangan 3:10

3:10 So you are to appoint Aaron and his sons, and they will be responsible for their priesthood; ¹  but the unauthorized person ²  who comes near must be put to death.”

[3:10]  ¹ tc The LXX includes the following words here: “and all things pertaining to the altar and within the veil.” Cf. Num 18:7.

[3:10]  ² tn The word is זָר (zar), usually rendered “stranger, foreigner, pagan.” But in this context it simply refers to anyone who is not a Levite or a priest, an unauthorized person or intruder in the tabernacle. That person would be put to death.