And they shall be on Aaron and on his sons when they enter the tent of meeting, or when they approach the altar to minister in the Holy Place, so that they do not incur guilt and die. It shall be a statute forever to him and to his descendants after him.
They shall therefore perform their duty to Me, so that they do not bear sin because of it and die by it because they profane it; I am the Lord who sanctifies them.
But you and your sons with you shall attend to your priesthood for everything that concerns the altar and inside the veil, and you are to perform service. I am giving you the priesthood as a service that is a gift, and the unauthorized person who comes near shall be put to death.”
Now those who were to camp in front of the tabernacle eastward, in front of the tent of meeting toward the sunrise, were Moses and Aaron and his sons, performing the duties of the sanctuary for the obligation of the sons of Israel; but the layman coming near was to be put to death.