Mishneh Torah — Negative Mitzvot מצוות לא תעשה, Chapter 89
The full Hebrew text of Mishneh Torah, Negative Mitzvot, Chapter 89, with English translation by Maimonides (Rambam).
שלא להעלות קודשים בחוץ, שנאמר "הישמר לך, פן תעלה עולותיך" (דברים יב,יג).
Not to offer sacred offerings outside [the Temple], as [Deuteronomy 12:13] states: "Be careful, lest you offer your burnt offerings...."