Read Leviticus 19:6 Using Other Translations
It shall be eaten the same day ye offer it, and on the morrow: and if ought remain until the third day, it shall be burnt in the fire.
It shall be eaten the same day you offer it or on the day after, and anything left over until the third day shall be burned up with fire.
The sacrifice must be eaten on the same day you offer it or on the next day. Whatever is left over until the third day must be completely burned up.