Deuteronomy 18:5
For the LORD your God has chosen them and their descendants from among your tribes to stand and serve in the name of the LORD all their lives."
Deuteronomy 10:8
At that time the LORD set apart the tribe of Levi to carry the Ark of the Covenant of the LORD, to stand in the LORD's presence, to serve, and to bless his name until this day.
Deuteronomy 17:12
If a man presumptuously disregards the priest who is serving the LORD your God there or the judge, that person must die so you will purge evil from Israel.
Exodus 28:1-14
"You are to bring your brother Aaron, along with his sons, from among the Israelis so they can serve as priests for me: that is, Aaron and his sons Nadab, Abihu, Eleazar, and Ithamar.
Numbers 3:10
Appoint Aaron and his sons so that they are to take responsibility for their priesthood. Any unauthorized person who approaches it is to be put to death."
Numbers 16:5
Then he addressed Korah and his entire company, "In the morning, may the LORD reveal who belongs to him and who is holy. May he cause that person to approach him. May he cause to approach him the one whom he has chosen.
Numbers 16:9-10
Is it such an insignificant thing to you that the God of Israel has separated you from the Israelis to draw you to himself, appointing you to do the work of the tent of the LORD and to stand before the community to minister to them?
Numbers 17:5-9
The rod that belongs to the man whom I'll choose will burst into bloom. That's how I'll put a stop to the complaints of the Israelis, who are complaining against you."
Numbers 25:13
for him and for his descendants after him, too, a covenant of perpetual priesthood, because he was zealous for his God and made atonement for the Israelis."