Mishneh Torah — Positive Mitzvot מצוות עשה, Chapter 16
The full Hebrew text of Mishneh Torah, Positive Mitzvot, Chapter 16, with English translation by Maimonides (Rambam).
לְהַקְהִיל אֶת הָעָם לִשְׁמֹעַ תּוֹרָה בְּמוֹצָאֵי שְׁבִיעִית, שֶׁנֶּאֱמָר: "הַקְהֵל אֶת הָעָם..." (דברים לא, יב).
To collect the people to hear the Torah [being read] in the year following the shemitah year, as [Deuteronomy 31:12] states: "Gather together the people."