Leviticus 7:16-18

16And if the sacrifice of his offering be a vow, or voluntary, it shall be eaten the same day that he presented his sacrifice; on the morrow also the remainder of it shall be eaten;

17and the remainder of the flesh of the sacrifice on the third day shall be burned with fire.

18And if [any] of the flesh of the sacrifice of his peace-offering be eaten at all on the third day, it shall not be accepted, it shall not be reckoned to him that hath presented it; it shall be an unclean thing, and the soul that eateth of it shall bear his iniquity.