They shall be on Aharon, and on his sons, when they go in to the tent of meeting, or when they come near to the altar to minister in the holy place; that they don't bear iniquity, and die: it shall be a statute forever to him and to his descendants after him.
You and your sons with you shall keep your priesthood for everything of the altar, and for that within the veil; and you shall serve: I give you the priesthood as a service of gift: and the stranger who comes near shall be put to death.
Those who encamp before the tabernacle eastward, in front of the Tent of Meeting toward the sunrise, shall be Moshe, and Aharon and his sons, keeping the charge of the sanctuary for the charge of the children of Yisra'el. The stranger who comes near shall be put to death.