Ezra 2:62
These searched for their entries in the genealogical records, but they could not be found, so they were disqualified from the priesthood.
Numbers 3:10
You are to appoint Aaron and his sons to carry out their priestly responsibilities, but any unauthorized person who comes near the sanctuary must be put to death.”
Leviticus 21:21-23
No descendant of Aaron the priest who has a defect is to come near to present the fire offerings to the Lord. He has a defect and is not to come near to present the food of his God.
Numbers 16:39-40
So Eleazar the priest took the bronze firepans that those who were burned had presented, and they were hammered into plating for the altar,
Numbers 18:7
But you and your sons will carry out your priestly responsibilities for everything concerning the altar and for what is inside the veil, and you will do that work. I am giving you the work of the priesthood as a gift,
Ezekiel 44:10-14
Surely the Levites who wandered away from Me when Israel went astray, and who strayed from Me after their idols,