Mishneh Torah — Negative Mitzvot מצוות לא תעשה, Chapter 23
The full Hebrew text of Mishneh Torah, Negative Mitzvot, Chapter 23, with English translation by Maimonides (Rambam).
שלא לבנות עיר הנידחת לכמות שהייתה, שנאמר "לא תיבנה עוד" (דברים יג,יז).
Not to rebuild an apostate city to its former stature, as [Deuteronomy 13:17] states: "It shall never be rebuilt."