Pesahim 54a and Pesahim 54b, making a brakha on fire either after Shabbat or Yom Kippur, aggadeta about creation’s final pieces, and then the custom to do work on Tish’a B’Av or not.
Pesahim 54a and Pesahim 54b, making a brakha on fire either after Shabbat or Yom Kippur, aggadeta about creation’s final pieces, and then the custom to do work on Tish’a B’Av or not.