The Torah establishes a severe spiritual penalty of being cut off for consuming forbidden fat, requiring precise boundaries regarding which animals and which specific fats are included in this restriction. The primary approach among commentators is that the prohibition is not limited strictly to animals formally dedicated as sacrifices. Rather, it applies to any animal belonging to a species that is fit for the altar, such as cattle, sheep, and goats, even if the animal is meant for a regular, everyday meal. This is evident from earlier warnings that explicitly forbid the fat of animals that died naturally or were torn by predators, which are inherently disqualified from being offered as sacrifices [רמב״ן, רשב״ם, שד״ל, הטור הארוך, רלב״ג, מלבי״ם, ביאור יש״ר, חזקוני, רש״ר הירש, ביאור שטיינזלץ, העמק דבר, רד״צ הופמן].
By linking the forbidden fat to species fit for sacrifice, the law intentionally excludes wild animals, such as deer, as well as birds and non-kosher animals. Because these creatures are never offered on the altar, their fat is completely permitted and may be eaten like regular meat [הטור הארוך, הכתב והקבלה, אור החיים, תורה תמימה]. At the same time, this categorization broadens the law to include animals of a sacrificial species that possess physical blemishes [אור החיים, תורה תמימה, מלבי״ם, רש״ר הירש] or are crossbred [אור החיים, אדרת אליהו]. Even though these specific animals cannot legally be brought to the altar, their fat remains strictly forbidden.
Beyond identifying the correct animal, the law defines the exact type of fat that is prohibited. The restriction applies exclusively to the specific portions of fat that are traditionally offered on the altar. Other fats found within the animal's body, such as the fat along the ribs, are entirely permitted [אור החיים, תורה תמימה, מלבי״ם, רש״ר הירש]. The severe penalty is deeply connected to earlier warnings, confirming that the punishment applies universally to all these forbidden fats, whether they come from a holy sacrifice or an ordinary meal [מלבי״ם, אור החיים].
The scope of the prohibition also covers unconventional methods of consumption. If a person melts the fat and drinks it, they are still held fully accountable. Although drinking is usually categorized differently than eating, if an individual desires the liquid fat and derives pleasure from drinking it, they incur the full penalty [תורה תמימה, מלבי״ם, צפנת פענח, אדרת אליהו].
Finally, liability for this severe punishment requires personal accountability and a specific minimum quantity. The penalty applies only to someone who personally consumes at least an olive-sized amount of the fat, and not to someone who merely feeds it to others [תורה תמימה, צפנת פענח]. The law is also framed with careful repetition regarding the act of consumption to prevent any misunderstanding about who bears the guilt. The punishment falls exclusively on the individual who actually eats the fat, and never on the person who originally presented the animal as an offering [רד״צ הופמן].