They shall be on Aaron and on his sons when they come into the tent of meeting or when they come near to the altar to minister in the holy place, so that they may not bear iniquity and die. It shall be a perpetual statute to him and his descendants after him.
And you and your sons with you will attend to your priesthood for everything at the altar, and within the veil, and you will serve. I have given your priesthood to you as a gift service, and the foreigner that comes near will be put to death.
But those who were to camp before the tabernacle toward the east, even before the tent of meeting on the east side, were Moses, and Aaron and his sons, keeping the guard of the sanctuary for the guard of the Israelites, and the foreigner who approached was to be put to death.