Numbers 3:10

3:10 So you are to appoint Aaron and his sons, and they will be responsible for their priesthood; but the unauthorized person who comes near must be put to death.”

Numbers 4:47

4:47 from thirty years old and upward to fifty years old, everyone who entered to do the work of service and the work of carrying relating to the tent of meeting –

Numbers 8:24

8:24 “This is what pertains to the Levites: At the age of twenty-five years and upward one may begin to join the company in the work of the tent of meeting,

Numbers 18:31

18:31 And you may eat it in any place, you and your household, because it is your wages for your service in the tent of meeting.

Numbers 31:14

The Death of the Midianite Women

31:14 But Moses was furious with the officers of the army, the commanders over thousands and commanders over hundreds, who had come from service in the war.

Numbers 35:15

35:15 These six towns will be places of refuge for the Israelites, and for the foreigner, and for the settler among them, so that anyone who kills any person accidentally may flee there.