Mishneh Torah — Positive Mitzvot מצוות עשה, Chapter 91
The full Hebrew text of Mishneh Torah, Positive Mitzvot, Chapter 91, with English translation by Maimonides (Rambam).
לשרוף הנותר, שנאמר: "והנותר, מבשר הזבח--ביום, השלישי, באש, יישרף" (ויקרא ז,יז).
To burn the leftovers [from the sacrifices], as [Leviticus 7:17] states: "The leftovers from the flesh of the sacrifice shall be burnt with fire on the third day."