I remember once learning that the Vilna Gaon said that Maseches Sukkah (Bavli, Yerushalmi, Tosefta) talks about 85 non-kosher sukkot and 91 kosher sukkot.
The Gra said the way to remember this is that:
סכה (with no "ו") has a gematria of 85 - which represents the number of non-kosher sukkot.
סוכה (with a "ו") has a gematria of 91 - which represents the number of kosher sukkot.
A couple questions:
- 1) Does anyone know the source/ link where this teaching can be found?
- 2) Has anyone scoured the Bavli, Yerushalmi, Tosefta and compiled a list of these 85 non-kosher and 91 kosher sukkot?