Mishneh Torah — Negative Mitzvot מצוות לא תעשה, Chapter 134
The full Hebrew text of Mishneh Torah, Negative Mitzvot, Chapter 134, with English translation by Maimonides (Rambam).
שלא יאכל אפילו תושב כוהן ושכירו תרומה, שנאמר "תושב כוהן ושכיר, לא יאכל קודש" (ויקרא כב,י).
For not even a tenant or a hired worker employed by a priest to partake of terumah, as [Leviticus 22:10] states: "A tenant of a priest or [his] hired worker shall not eat the holy [food]."