Mishneh Torah — Negative Mitzvot מצוות לא תעשה, Chapter 142
The full Hebrew text of Mishneh Torah, Negative Mitzvot, Chapter 142, with English translation by Maimonides (Rambam).
שלא לאכול מעשר שני של תירוש חוץ לירושלים, שנאמר "תירושך" (דברים יב,יז).
Not to consume wine [separated as] the second tithe outside of Jerusalem, as [Deuteronomy, ibid.] continues: "...your wine...."