They are to eat those things with which atonement was made, to consecrate and to sanctify them, but a layman is not to eat them, because they are holy.
Moses spoke to Aaron and to Eleazar and Itamar his surviving sons: “Take the grain offering left over from Adonai’s offerings by fire, and eat it without hametz beside the altar, for it is most holy.
Whenever the Tabernacle sets out, the Levites are to dismantle it, and whenever the Tabernacle is pitched, the Levites are to set it up. But the commoner who comes near to it must be put to death.
just as Adonai had spoken to him by Moses’ hand, so that it would be as a reminder to Bnei-Yisrael that no one who was not a descendant of Aaron should burn incense before Adonai, and so no one would become like Korah and his following.
Then he said to Korah and all his following saying, “In the morning Adonai will reveal who is His and who is holy. The one whom He will let come near to Him will be the one He chooses to come near to 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.