Numbers 4:18 - Ellicott's Commentary On The Whole Bible

Cut ye not off the tribe... — The word shebet (tribe) is here used in a very peculiar sense, and denotes one division only of the tribe of Levi. In this and the following verses the injunction already given (Numbers 5:15) is renewed, and Moses and Aaron are charged not to be guilty of such negligence in respect of it as might expose the Kohathites to death in consequence of their unlawful treatment of the holy things. Moses and Aaron might be said to do that which would be the result of their negligence. In like manner St. Paul enjoins the Roman Christians in these words: “Destroy not him with thy meat for whom Christ died” (Romans 14:15).