Leviticus 7:17-18 -- 17 “The remainder of the flesh of the sacrifice on the third day must be burned with fire. 18 And 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.”

Exodus 12:10 -- “You shall let none of it remain until morning, and what remains of it until morning you shall burn with fire.”