4 They will be joined to you, and they will keep the responsibility of the tent of assembly for the entire service of the tent; a stranger may not come near you.
Numbers 18:4 Cross References - LEB
Numbers 1:51
51 And when the tabernacle is set out, the Levites will ⌊take it down⌋,* and when encamping the tabernacle the Levites will set it up; the stranger* that approaches it will be put to death.
Numbers 3:10
10 But you will count Aaron and his descendants; they will keep their priesthood, and the stranger* who approaches will be put to death."
1 Samuel 6:19
19 He* struck seventy men* among the men of Beth Shemesh because they looked into the ark of Yahweh. So the people mourned because Yahweh had struck a great blow among the people.