Mishneh Torah — Positive Mitzvot מצוות עשה, Chapter 65
The full Hebrew text of Mishneh Torah, Positive Mitzvot, Chapter 65, with English translation by Maimonides (Rambam).
מעשה האשם, שנאמר: "זֹאת תּוֹרַת הָאָשָׁם" (ויקרא ז, א).
The guilt offering, as [Leviticus 7:1] states: "These are the laws of the guilt offering...."