Young Israel of Westside Shiurim

1. It’s forbidden to insulate on Shabbos itself even if the material does not add additional heat. (Lest one come to heat up the food to peak temp before insulating) 2. If one insulated correctly before Shabbos and it subsequently fell off, it is ok to replace the insulation 3. Cold water may be insulated. (Rashi explains it means to keep it cool) 4. Cold food that is typically insulated to keep h...

The importance of the Kohen for tzaras

1. The mishna discussed the scneario of using wool shearings to insulate a pot where the wool is muktzeh and one has to shake off the shearings to access the food. According to rava, this is only if one didn’t designate the shearings for insulation, but if they were designated, they are no longer muktzeh. Without designation, however, they are very much muktzeh even thigh they have been used now f...

Antigonus Ish Socho

The idea of seeing the person and not just the blemish

1. The mishna has a group of materials are forbidden to use for insulation only when they are moist. When they are moist, they add heat, but when they’re dry, it’s muttar bc they don’t add heat. ( straw grape skins grasses or fibers) The gemara in unsure if this is only when they’re naturally moist or even externally moist 2. Fruits and clothing can be used or insulation. (Dispute beteeen mishna a...

How the parshas name relates to tzaras. Why we celebrate the end of death

1. Placing one kettle on top of another kettle in not considered hatmana. However, on Shabbos, one should not heat cold water by placing on top of a hot kettle. 2. Squeezing a cloth or turban on Shabbos is forbidden. (It’s cleaning the material) The Rabbis do not let one place his turban in place where it will get wet so he won’t be tempted to squeeze out the water. There’s no such conern by an or...

What is the meaning of the word "Omer" and why is it so important 

1. We’ve discussed the rule of bosis for muktzeh also becoming muktzeh. The gemara introduces the concept of a בסיס לדבר המותר ולדבר האסור- where the bosis Is both for a muktzeh and non muktzeh item. If there is a basket that holds both a rock and fruits, where clearly the fruit is more significant than the rock, the basket is not muktzeh. 2. Even if the muttar item is only slightly more significa...

The tragic story of Gechazi and the lasting hope of his legacy 

1. One can’t move a menorah that has dif sections bc if it falls one may be tempted to fix it and this is forbidden bc of מכה בפטיש. A large menorah with grooves may be mistaken for a sectioned menorah and is forbidden to move. A small grooved menorah is a dispute 2. It’s very complicated for how we rule between r shimon and r Yehuda regrading a lamp that went out on Shabbos. The amoraim were very...

1. It is forbidden to climb or use trees on Shabbos/Yom tov (lest one come to cut off a branch) The rabbis even forbid placing lamps on trees for Yom tov bc one may come to ascend the tree to go move the lamp at some point on Yom tov, but on Shabbos, if the Halacha is like r Yehuda that a lit lamp Remains muktzeh for the whole Shabbos, it is ok to keep it on a tree for Shabbos bc there’s no concer...

1. Leftover oil in lamp lit on Shabbos is muktzeh according to r Yehuda but not muktzeh according to r shimon 2. מוקצה מחמת מיאוס- a kli that became gross and unlikely to be used on Shabbos. (Example: an old earthenware lamp, not lit on shabbks even) r Yehuda holds its muktzeh but r Meir and r shimon do not. 3. מוקצה מחמת איסור- a kli that was inaccessible when Shabbos began bc it would be violati...

Symbolism of fins and scales

1. The mishna said one can’t move a cup to catch dripping oil from the lamp. The Gemara introduces a new reason for this based in the principle of ביטול כלי מהיכנו- if the muktzeh oil will fall in the kli, kli will become a בסיס base for the muktzeh and will also become muktzeh. Making a non muktzeh kli into muktzeh is rabbiniccslky forbidden on Shabbos (bc it resembles building/destroying the kli...

The importance of mesorah

1. Basic rule is that a כלי ראשון can cook but a כלי שני cannot. To illustrate, beis Hillel says that one can pour some cold water into hot water in a כלי שני. Beis Shammai, however, is stringent and does not allow it unless the hot water is being poured into cold. 2. Even though beis Hillel permits cold water to be poured into hot water in a כלי שני, he is stringent if the hot water is in a batht...

1. It is forbidden to touch ones member while urinating. However, one can touch it to cover themselves while bathing in river, because the fright of drowning in the water will ensure one will not be aroused. 2. It is generally prohibited to cover ones bris millah, bc it looks like they are ashamed of their bris. But for modesty, one may, like when they are facing towards people. 3. It is recommend...

1. With water heated up before Shabbos- one can’t wash their whole body but can wash hands face and feet. Rav holds limb by limb is fine (and maybe even the entire body except for one limb) and shmuel holds it is forbidden. The gemara seems to favor Shmeuls opinion that it is forbidden. 2. It used to be fine to bathe on Shabbos with water heated before, but the bath attendants were heating water o...

1. Cooking on Shabbos is forbidden form the Torah even with derivatives of fire. Even slightly roasting an egg by placing it next to a kettle is assur from the Torah. 2. Cooking in the sun itself on Shabbos is totally permissible. Cooking in תולדות החמה- like a hot scarf heated by the sun- is assur rabbinically so it’s not consumes with תולדות האור. But r Yosi permits it and makes no decree 3. Eve...

1. If someone cooked on Shabbos, we generally make a distinction between whether it was intentional (food is forbidden) and unintentional (food is permitted). However, regarding the laws of שהייה we are stricter. The rabbis said that even if it’s done unintentionally, the food is forbidden to eat. This was a second decree because ppl were doing שהייה intentionally and claiming it was unintentional...

1. As mentioned on daf 36, we have two possible ways to interpret our mishna. The divergence is based on the dispute between chananya and the rabbis about שהייה- leaving food from before Shabbos on exposed fire to cook by itself. The rabbis forbid this (bc one may be tempted to stoke the coals) while chananya permits it if the food is already מאכל בן דרוסאי- jsut edible. The gemara is ultimately u...

1. Shofar and trumpets are a Tanaic dispute for muktzeh on Shabbos. One important variable is that a shofar is curved and usable as a cup for a child. R yehudas position is that the shofar is not muktzeh at all but the trumpets are. R shimon holds even the trumpets are not muktzeh (evidently he holds a utensil primarily used for issur is not muktzeh) R Nechemiah holds even a shofar is muktzeh bc h...

1. Tremendously Large keilim cannot be considered movable keilim and they are therefore muktzeh on Shabbos and not subject to tumah. The size for excessively large is a kli that holds either 2 kor, 3 joe, or 4. (It’s a dispute) 2. We said bein hashmashos is determined by the redness in the eastern sky. We really mean that there is an intensity of redness in the western sky that shines onto the eas...