Numbers 3:28
According to the number of all the males, from a month old and upward, there were 8,600, keeping guard over the sanctuary.
Numbers 3:7
They shall keep guard over him and over the whole congregation before the tent of meeting, as they minister at the tabernacle.
Numbers 3:31
And their guard duty involved the ark, the table, the lampstand, the altars, the vessels of the sanctuary with which the priests minister, and the screen; all the service connected with these.
Numbers 4:35-36
from thirty years old up to fifty years old, everyone who could come on duty, for service in the tent of meeting;