Mishneh Torah — Positive Mitzvot מצוות עשה, Chapter 101
The full Hebrew text of Mishneh Torah, Positive Mitzvot, Chapter 101, with English translation by Maimonides (Rambam).
להיות המצורע טמא ומטמא.
For a person afflicted with tzara’at to be impure and to impart impurity.