Therefore thou and thy sons with thee shall keep your priest’s office for every thing 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.
Jewish Publication Society of America Version (JPS1917) - Numbers 18:7 >And thou and thy sons with thee shall keep your priesthood in everything that pertaineth to the altar, and to that within the veil; and ye shall serve; I give you the priesthood as a service of gift; and the common man that draweth nigh shall be put to death.'