Leviticus 7:23-25

23Speak to the people of Israel, saying, aYou shall eat no fat, of ox or sheep or goat. 24The fat of an animal bthat dies of itself and the fat of one that is torn by beasts may be put to any other use, but on no account shall you eat it. 25For every person who eats of the fat of an animal of which a food offering may be made to the Lord shall be cut off from his people.
Copyright information for ESV