For the source text click/tap here: Pesachim 54
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According to the Mishna, even in places where the custom was to permit people to work on Tisha b’Av, Torah scholars refrained from working. Rabban Shimon ben Gamliel taught that it would be appropriate for everyone to consider himself a scholar with regard to this custom, i.e. that anyone who can, should refrain from work on the fast day.
This leads us to the notion of mourning, Tisha B’AV (a la Soloveitchik) and ending with the poetry of Paul Celan who reshaped language in the face of the SHOAH.
“No more need for walls, no more need for barbed wire as in the concentration camps. The incarceration is chemical “