Numbers 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.”

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

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.