The remainder of the grain offering: They usually reserved a part of the fire offerings for the priest as food (see 6:16–17). Exceptions included:
the whole burnt offering, where the priest only received the hide (see 7:8),
offerings given by the priest for himself (4:3–12; 6:19–23), or
offerings made for the entire community (4:13–21).
In these cases, they completely burned the offering. The grain offering provided the priests with bread for their diet.
most holy part (Hebrew qodesh qodashim, which means “holy of holies”): Both God and what belongs to God are holy. The most holy part refers to the priestly share taken from the holy offering and reserved for a special purpose. Numbers 18:8–10 uses this term for the priest’s share of any gifts dedicated to the Lord.