Numbers 3:10

3:10 So you are to appoint Aaron and his sons, and they will be responsible for their priesthood; but the unauthorized person who comes near must be put to death.”

Numbers 3:38

3:38 But those who were to camp in front of the tabernacle on the east, in front of the tent of meeting, were Moses, Aaron, and his sons. They were responsible for the needs of the sanctuary and for the needs of the Israelites, but the unauthorized person who approached was to be put to death.

Numbers 16:40

16:40 It was a memorial for the Israelites, that no outsider who is not a descendant of Aaron should approach to burn incense before the Lord, that he might not become like Korah and his company – just as the Lord had spoken by the authority of Moses.

Numbers 18:22

18:22 No longer may the Israelites approach the tent of meeting, or else they will bear their sin and die.

Leviticus 22:10-13

22:10 “‘No lay person may eat anything holy. Neither a priest’s lodger nor a hired laborer may eat anything holy, 22:11 but if a priest buys a person with his own money, that person may eat the holy offerings, and those born in the priest’s own house may eat his food. 22:12 If a priest’s daughter marries a lay person, she may not eat the holy contribution offerings, 22:13 but if a priest’s daughter is a widow or divorced, and she has no children so that she returns to live in her father’s house as in her youth, she may eat from her father’s food, but no lay person may eat it.

Leviticus 22:1

Regulations for the Eating of Priestly Stipends

22:1 The Lord spoke to Moses:

Leviticus 6:19

The Grain Offering of the Priests

6:19 Then the Lord spoke to Moses:

Leviticus 6:2

6:2 “When a person sins and commits a trespass against the Lord by deceiving his fellow citizen in regard to something held in trust, or a pledge, or something stolen, or by extorting something from his fellow citizen,

Leviticus 6:7

6:7 So the priest will make atonement on his behalf before the Lord and he will be forgiven for whatever he has done to become guilty.”