Deuteronomy 18:5
For Yahweh your God has chosen him out of all your tribes, to stand to minister in the name of Yahweh, him and his sons for ever.
Deuteronomy 10:8
At that time Yahweh set apart the tribe of Levi, to bear the ark of the covenant of Yahweh, to stand before Yahweh to minister to him, and to bless in his name, to this day.
Deuteronomy 17:12
The man who does presumptuously, in not listening to the priest who stands to minister there before Yahweh your God, or to the judge, even that man shall die: and you shall put away the evil from Israel.
Exodus 28:1-14
"Bring Aaron your brother, and his sons with him, near to you from among the children of Israel, that he may minister to me in the priest's office, even Aaron, Nadab and Abihu, Eleazar and Ithamar, Aaron's sons.
Numbers 3:10
You shall appoint Aaron and his sons, and they shall keep their priesthood. The stranger who comes near shall be put to death."
Numbers 16:5
and he spoke to Korah and to all his company, saying, "In the morning Yahweh will show who are his, and who is holy, and will cause him to come near to him: even him whom he shall choose he will cause to come near to him.
Numbers 16:9-10
Is it a small thing to you, that the God of Israel has separated you from the congregation of Israel, to bring you near to himself, to do the service of the tabernacle of Yahweh, and to stand before the congregation to minister to them;
Numbers 17:5-9
It shall happen, that the rod of the man whom I shall choose shall bud: and I will make to cease from me the murmurings of the children of Israel, which they murmur against you."
Numbers 25:13
and it shall be to him, and to his seed after him, the covenant of an everlasting priesthood; because he was jealous for his God, and made atonement for the children of Israel.'"