Numbers 18:7 Num. 18:7
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.
Hebrews 9:6 Heb. 9:6
Now when these things were thus ordained, the priests went always into the first tabernacle, accomplishing the service of God.
(Relation)