Num 18.7 Therefore thou and thy sons with thee shall keep your priest's office for everything of the altar, and within the vail; and ye shall serve: I have given your priest's office unto you as a service of gift: and the stranger that cometh nigh shall be put to death.
Evr 5.1-4 For every high priest taken from among men is ordained for men in things pertaining to God, that he may offer both gifts and sacrifices for sins: