וְהָיָ֗ה כָּל־הַנּוֹתָר֙ מִכָּל־הַגּוֹיִ֔ם הַבָּאִ֖ים עַל־יְרֽוּשָׁלִָ֑ם וְעָל֞וּ מִדֵּ֧י שָׁנָ֣ה בְשָׁנָ֗ה לְהִֽשְׁתַּחֲוֺת֙ לְמֶ֙לֶךְ֙ יְהוָ֣ה צְבָא֔וֹת וְלָחֹ֖ג אֶת־חַ֥ג הַסֻּכּֽוֹת׃
Rashi on Zechariah
the festival of Tabernacle As our Sages explained in tractate Avodah Zarah (3a): I have an easy commandment named Sukkah, as is stated in the first halachic discussion.