Rabbi Kwass - Acharonim Chabura: Are Shabbat Meals a Biblical or Rabbinic Obligation?
Shapell's/MRC Virtual Beit Midrash - A podcast by Shapell's Rabbeim
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Source material: https://docs.google.com/presentation/d/1JoLxIG3Dv3mm0KSdWjTOE4sGMWneUuvgXWBcHFAjx7Y/edit#slide=id.g8ceb69917b_0_0
