In Context

18 'Ye do not cut off the tribe of the families of the Kohathite from the midst of the Levites;

19 but this do to them, and they have lived, and do not die in their drawing nigh the holy of holies: — Aaron and his sons go in, and have set them, each man to his service, and unto his burden,

20 and they go not in to see when the holy thing is swallowed, that they have died.'

21 And Jehovah speaketh unto Moses, saying,

22 'Take up the sum of the sons of Gershon also by the house of their fathers, by their families;

23 from a son of thirty years and upward, till a son of fifty years thou dost number them, every one who is going in to serve the host, to do the service in the tent of meeting.

Numbers 4:21 in Other Translations