Deuteronomy 18:5
For he, and his sons after him for ever, have been marked out by the Lord your God from all your tribes, to do the work of priests in the name of the Lord.
Deuteronomy 10:8
At that time the Lord had the tribe of Levi marked out to take up the ark of the Lord's agreement, to be before the Lord and to do his work and to give blessings in his name, to this day.
Deuteronomy 17:12
And any man who, in his pride, will not give ear to the priest whose place is there before the Lord your God, or to the judge, is to be put to death: you are to put away the evil from Israel.
Exodus 28:1-14
Now let Aaron your brother, and his sons with him, come near from among the children of Israel, so that they may be my priests, even Aaron, and Nadab, Abihu, Eleazar, and Ithamar, his sons.
Numbers 3:10
And give orders that Aaron and his sons are to keep their place as priests; any strange person who comes near is to be put to death.
Numbers 16:5
And he said to Korah and his band, In the morning the Lord will make clear who are his, and who is holy, and who may come near him: the man of his selection will be caused to come near him.
Numbers 16:9-10
Does it seem only a small thing to you that the God of Israel has made you separate from the rest of Israel, letting you come near himself to do the work of the House of the Lord, and to take your place before the people to do what has to be done for them;
Numbers 17:5-9
And the rod of that man who is marked out by me for myself will have buds on it; so I will put a stop to the outcries which the children of Israel make to me against you.
Numbers 25:13
And by this agreement, he and his sons after him have the right to be priests for ever; because, by his care for the honour of his God, he took away the sin of the children of Israel.