Leviticus 7:18-20

18And if any of the flesh of the sacrifice of his peace offering is eaten at all on the third day, it shall not be accepted, nor shall it be imputed to him; it shall be an abomination to him who offers it, and the person who eats of it shall bear guilt.

19‘The flesh that touches any unclean thing shall not be eaten. It shall be burned with fire. And as for the clean flesh, all who are clean may eat of it.

20But the person who eats the flesh of the sacrifice of the peace offering that belongs to the Lord, while he is unclean, that person shall be cut off from his people.