"No non-priest shall eat of the holy [food]"Leviticus 22:10.

An individual who is not a priest may not eat Terumah (the priestly tithe), nor any of the other holy foods whose consumption is restricted to priests [and certain of their family members and non-Jewish indentured workers].

This precept also includes the prohibition against deriving benefit from any object that belongs to the "holy" [i.e., sacrifices or items belonging to the Temple coffers].