Deuteronomy 18:5
for Jehovah thy God hath chosen him out of all thy tribes, that he may stand to serve in the name of Jehovah, he and his sons continually.
Deuteronomy 10:8
At that time Jehovah separated the tribe of Levi, to bear the ark of the covenant of Jehovah, to stand before Jehovah to do service unto him, and to bless in his name, unto this day.
Deuteronomy 17:12
And the man that shall act presumptuously, and not hearken unto the priest that standeth to serve there before Jehovah thy God, or unto the judge, that man shall die; and thou shalt put away evil from Israel.
Exodus 28:1-14
And thou shalt take thee Aaron thy brother, and his sons with him, from among the children of Israel, that he may serve me as priest Aaron, Nadab and Abihu, Eleazar and Ithamar, Aaron's sons.
Numbers 3:10
And Aaron and his sons shalt thou appoint that they may attend to their priest's office; and the stranger that cometh near shall be put to death.
Numbers 16:5
And he spoke to Korah and to all his band, saying, Even to-morrow will Jehovah make known who is his, and who is holy; and he will cause him to come near to him; and him whom he has chosen, him will he cause to come near to him.
Numbers 16:9-10
Is it too little for you, that the God of Israel has separated you from the assembly of Israel, to bring you near to himself to do the work of the tabernacle of Jehovah, and to stand before the assembly to minister to them?
Numbers 17:5-9
And it shall come to pass, that the man whom I shall choose, his staff shall bud forth; and I will make to cease from before me the murmurings of the children of Israel, that they murmur against you.
Numbers 25:13
And he shall have it, and 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.