Mishneh Torah — Positive Mitzvot מצוות עשה, Chapter 102
The full Hebrew text of Mishneh Torah, Positive Mitzvot, Chapter 102, with English translation by Maimonides (Rambam).
להיות בגד מנוגע טמא ומטמא.
For a garment afflicted with tzara’at to be impure and to impart impurity.