Leviticus 7:17-19

New Century Version

¹⁷ If any meat from this sacrifice is left on the third day, it must be burned up. ¹⁸ Any meat of the fellowship offering eaten on the third day will not be accepted, nor will the sacrifice count for the person who offered it. It will become unclean, and anyone who eats the meat will be guilty of sin.

¹⁹ “‘People must not eat meat that touches anything unclean; they must burn this meat with fire. Anyone who is clean may eat other meat.