Mishneh Torah — Negative Mitzvot מצוות לא תעשה, Chapter 350
The full Hebrew text of Mishneh Torah, Negative Mitzvot, Chapter 350, with English translation by Maimonides (Rambam).
שלא לשכב עם זכר, שנאמר "ואת זכר--לא תשכב" (ויקרא יח,כב).
Not to commit sodomy, as [Leviticus 18:22] states: "And do not lie with a male...."