Bible Verses About Priests: All except seed of Aaron excluded from being

You shall appoint Aaron and his sons, and they shall keep their priesthood. The stranger who comes near shall be put to death.”

to be a memorial to the children of Israel, to the end that no stranger, who isn’t of the seed of Aaron, would come near to burn incense before the LORD, that he not be as Korah, and as his company; as the LORD spoke to him by Moses.

You and your sons with you shall keep your priesthood for everything of the altar, and for that within the veil. You shall serve. I give you the service of the priesthood as a gift. The stranger who comes near shall be put to death.”