Numbers 3:28
In, the counting of every male, from one month old and upwards, there were eight thousand and six hundred, to keep the charge of the sanctuary.
Numbers 3:7
so shall they keep his charge, and the charge of all the assembly, before the tent of meeting, - to do the laborious work of the habitation;
Numbers 3:31
And their charge, was - the ark and the table and the lampstand and the altars, and the utensils of the sanctuary wherewith they were to minister, - and the screen, as to all the laborious work thereof.
Numbers 4:35-36
from thirty years old and upwards, even unto fifty years old, all that might enter the host, to labour in the tent of meeting;