and they shall be upon Aaron, and upon his sons, when they go into the tent of meeting, or when they come near the altar to minister in the holy place; lest they bring guilt upon themselves and die. This shall be a perpetual statute for him and for his descendants after him.
And you and your sons with you shall attend to your priesthood for all that concerns the altar and that is within the veil; and you shall serve. I give your priesthood as a gift, and any one else who comes near shall be put to death.”
And those to encamp before the tabernacle on the east, before the tent of meeting toward the sunrise, were Moses and Aaron and his sons, having charge of the rites within the sanctuary, whatever had to be done for the people of Israel; and any one else who came near was to be put to death.