Mishneh Torah — Negative Mitzvot מצוות לא תעשה, Chapter 131
The full Hebrew text of Mishneh Torah, Negative Mitzvot, Chapter 131, with English translation by Maimonides (Rambam).
שלא לאכול נותר, שנאמר "ואוכליו עוונו יישא . . . ונכרתה הנפש ההיא, מעמיה" (ויקרא יט,ח).
Not to eat sacrificial meat that has remained past the limits allotted for its consumption, as [Leviticus 19:8] states: "One who eats it shall bear his guilt,... his soul will be punished by karet."