Shabbat 138 - July 22, Rosh Chodesh Av, 1 Av

Today's shiur is sponsored by Elizabeth Kirshner in loving memory of her father, Rabbi Gabriel M. Kirshner, HaRav Gavriel Meir ben HaRav Shraga Feyvel z"l, who instilled in her a love of Torah from the very first moments of her life. May his neshama have an aliyah and may his legacy bring healing and harmony to the world. And by Caroline Musin Berkowitz in honor of the 98th birthday of her grandmother, Florence Hirsch. As it says in Arakhin 19a, savta b'veita, sima (treasure) b'veita. She is our treasure indeed. And by Marcia Baum in memory of her father Sam Baum, Chaim Simcha Ben Aaron Halevi and Leba z"l , on his 17th Yartzeit. He taught his daughters that they could be, do and learn anything... including the Talmud. And wishing Kay Weinberger a very happy birthday, chodesh tov , and hope you are enjoying learning daf - with love from Valerie Adler.

According to the rabbis who forbid hanging up the wine strainer, is it forbidden by Torah law due to building or by rabbinic law due to the fact that it is considered uvda d'chol, a weekday activity? Rav Yosef and Abaye disagree. Abaye splits building into 3 categories and lists braitot that discuss what type of building is forbidden by Torah law, rabbinic law or entirely permitted (like folding chairs/tables). According to the rabbis who forbade straining the wine of Shabbat, is it by Torah or rabbinic law? Is it because of the melacha of separating or sifting? The gemara discusses various type of temporary tents and explains under what conditions can one build a bridal canopy? Rami bar Yechezkel asked Rav Huna to tell him some laws of Rav regarding Shabbat and also something regarding Torah. In that context, the gemara brings Rav's opinion that there will come a time when the Torah will be forgotten. A Tosefta is brought saying the same things, using a verse from Amos. The gemara goes to lengths to assess what type of Torah will be forgotten? Will it be even things written in the Torah explicitly or in the mishna or did he mean more complicated things? Rabbi Shimon bar Yochai disagrees and thinks that the Torah will not be forgotten - the issue will be that there will not be one central halachic authority and it will be unclear what the law is.