Likutei Moharan 266:3/ליקוטי מוהר"ן רס״ו:ג׳

13. This is also the aspect of Shavuot, for Shavuot and Sukkot are one. This is because the Torah emerges from Binah, which is the aspect of sukkah, as it is written (Proverbs 1:8), “and do not forsake the Torah of IMekha (your Mother),” the aspect of “IM you call to Binah,” which is the aspect of sukkah, as explained above.

2Therefore, immediately after Sukkot is Simchat Torah, for the Torah emerges from the aspect of sukkah. Thus it is that by people entering the sukkah, they themselves become an aspect of Torah, for the Torah emerges from there, as explained above. And then the Torah begins, which is “Bereishit (In the beginning),” the aspect of BaYit (house)—i.e., the BeYT of Bereishit. This is the aspect of “Yaakov journeyed to Sukkot and built himself a bayit,” as explained above.

3And this is the aspect of SiYVaN—the time of the Giving of the Torah; it is an acronym of “v’Yaakov Nasa Sukkotah Vayiven lo bayit…,” as explained above.