Albert Barnes Commentary Leviticus 21:8

"Thou shalt sanctify him therefore; for he offereth the bread of thy God: he shall be holy unto thee: for I Jehovah, who sanctify you, am holy." — Leviticus 21:8 (ASV)

The people of Israel are now addressed. They are commanded to regard the priests, who perform for them the service of the altar, as holy with respect to their office.