Exodus 27:21; Numbers 18:7

21 vIn the tent of meeting, woutside the veil that is before the testimony, Aaron and his sons shall tend it from evening to morning before the Lord. It shall be a statute forever to be observed throughout their generations by the people of Israel.


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.