Mishneh Torah — Negative Mitzvot מצוות לא תעשה, Chapter 132
The full Hebrew text of Mishneh Torah, Negative Mitzvot, Chapter 132, with English translation by Maimonides (Rambam).
שלא לאכול פיגול, שנאמר "המקריב אותו לא ייחשב לו, פיגול יהיה; והנפש האוכלת ממנו, עוונה תישא" (ויקרא ז,יח); והוא בכרת.
Not to eat piggul, as [Leviticus 7:18] states: "It will not be accepted for him. Instead, it will be considered as piggul. Any person who eats it will bear his guilt." This sin is punishable by karet.