Deuteronomy 18:5
For the LORD your God has chosen him out of all your tribes, to stand to minister in the name of the LORD, him and his sons forever.
Deuteronomy 10:8
At that time the LORD set apart the tribe of Levi, to bear the ark of the covenant of the LORD, to stand before the LORD to minister unto him, and to bless in his name, unto this day.
Deuteronomy 17:12
And the man that will act presumptuously, and will not hearken unto the priest that stands to minister there before the LORD your God, or unto the judge, even that man shall die: and you shall put away the evil from Israel.
Exodus 28:1-14
And take unto you Aaron your brother, and his sons with him, from among the children of Israel, that he may minister unto me in the priest's office, even Aaron, Nadab and Abihu, Eleazar and Ithamar, Aaron's sons.
Numbers 3:10
And you shall appoint Aaron and his sons, and they shall wait on their priest's office: and the stranger that comes near shall be put to death.
Numbers 16:5
And he spoke unto Korah and unto all his company, saying, Even tomorrow the LORD will show who are his, and who is holy; and will cause him to come near unto him: even him whom he has chosen will he cause to come near unto him.
Numbers 16:9-10
Seems it but a small thing unto 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 the LORD, and to stand before the congregation to minister unto them?
Numbers 17:5-9
And it shall come to pass, that the man's rod, whom I shall choose, shall blossom: and I will make to cease from me the murmurings of the children of Israel, which they murmur against you.
Numbers 25:13
And he shall have it, and his descendants after him, even the covenant of an everlasting priesthood; because he was zealous for his God, and made an atonement for the children of Israel.