Leviticus 7:18-21 NIV

18 If any meat of the fellowship offering1 is eaten on the third day, it will not be accepted.2 It will not be credited3 to the one who offered it, for it is impure; the person who eats any of it will be held responsible.4

References for Leviticus 7:18

19 " 'Meat that touches anything ceremonially unclean must not be eaten; it must be burned up. As for other meat, anyone ceremonially clean may eat it.
20 But if anyone who is unclean5 eats any meat of the fellowship offering belonging to the LORD, that person must be cut off from his people.6

References for Leviticus 7:20

21 If anyone touches something unclean7--whether human uncleanness or an unclean animal or any unclean, detestable thing--and then eats any of the meat of the fellowship offering belonging to the LORD, that person must be cut off from his people.' "

References for Leviticus 7:21