Numbers 18:4

18:4 They must join ¹  with you, and they will be responsible for the care of the tent of meeting, for all the service of the tent, but no unauthorized person ²  may approach you.

Numbers 18:7

18:7 But you and your sons with you are responsible for your priestly duties, for everything at the altar and within the curtain. And you must serve. I give you the priesthood as a gift for service; but the unauthorized person who approaches must be put to death.”

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¹ tn Now the sentence uses the Niphal perfect with a vav (ו) consecutive from the same root לָוָה (lavah).

² tn The word is “stranger, alien,” but it can also mean Israelites here.