Leviticus 7:20

16 If, however, the sacrifice he offers is a vow or a freewill offering, it shall be eaten on the day he presents his sacrifice, but the remainder may be eaten on the next day.

17 But any meat of the sacrifice remaining until the third day must be burned up.

18 If any of the meat from his peace offering is eaten on the third day, it will not be accepted. It will not be credited to the one who presented it; it shall be an abomination, and the one who eats of it shall bear his iniquity.

19 Meat that touches anything unclean must not be eaten; it is to be burned up. As for any other meat, anyone who is ceremonially clean may eat it.

20 But if anyone who is unclean eats meat from the peace offering that belongs to the LORD, that person must be cut off from his people.

21 If one touches anything unclean, whether human uncleanness, an unclean animal, or any unclean, detestable thing, and then eats any of the meat of the peace offering that belongs to the LORD, that person must be cut off from his people.”

22 Then the LORD said to Moses,

23 “Speak to the Israelites and say, ‘You are not to eat any of the fat of an ox, a sheep, or a goat.

24 The fat of an animal found dead or mauled by wild beasts may be used for any other purpose, but you must not eat it.

Read all of Leviticus 7