Mishneh Torah — Negative Mitzvot מצוות לא תעשה, Chapter 102
The full Hebrew text of Mishneh Torah, Negative Mitzvot, Chapter 102, with English translation by Maimonides (Rambam).
שלא ליתן שמן זית במנחת חוטא, שנאמר "לא ישים עליה שמן" (ויקרא ה,יא).
Not to place olive oil on the meal offering brought by a sinner, as [Leviticus 5:11] states: "Do not place oil upon it."