Class One Hundred and Thirty one, Shabbos (before Mattan Torah) and the Manna.A very important but often overlooked aspect of Parshas Bishalach is the fact that Yidden received some Mitzvos at Mara, including Shabbos (Para Aduma and Dinim).The idea of Mitzvos before Mattan Torah is explored here, using the model of “organized religion” vs “personal…