Numbers 18:7
7 And cyou and your sons with you shall guard your priesthood for all that concerns the altar and dthat is within the veil; and you shall serve. I give your priesthood as a gift,1 and eany outsider who comes near shall be put to death.”
Numbers 18:22
22 aso that the people of Israel do not come near the tent of meeting, blest they bear sin and die.