They are to be worn by Aaron and his sons when they go into the Tent of Meeting or when they approach the altar to minister in the holy place, so that they do not become subject to guilt and die. It is to be a statute forever, to him and to his offspring after him.
But you and your sons with you are to maintain your priesthood for everything pertaining to the altar and inside the parokhet . I am giving you the ministry of the priesthood as a gift. Anyone unauthorized who approaches will die.”
Those camping in front of the Tent of Meeting, on the east, toward the sunrise, were Moses, Aaron, and his sons. They were to care for the Sanctuary on behalf of Bnei-Yisrael. But anyone unauthorized who approached had to be executed.