Charles Ellicott Commentary Leviticus 7:25

"For whosoever eateth the fat of the beast, of which men offer an offering made by fire unto Jehovah, even the soul that eateth it shall be cut off from his people." — Leviticus 7:25 (ASV)

The fat of the beast of which men offer an offering. — That is, the fat of cattle, sheep, or goats. (See Leviticus 7:23.) If he did it presumptuously, he incurred the penalty of being cut off; and if he did it inadvertently, he was beaten with forty stripes save one and had to bring the appointed sin offering.