There are two prohibitions listed in the Mishna – שהייה & חזרה
We are going to first focus on the איסור שהייה
Questions:
What is the reason for the איסור שהייה?
See רש”י לו: “עד שיגרוף
Why does Rashi source the reason for איסור שהייה to a Gemara of איסור הטמנה (insulating)?
Learn the גמרא דף לד עמוד ב which explains the two different types of הטמנה and why each are prohibited.
According to Rashi how does גרוף או קטום remove the fact of מוסיף הבל?
Learn תוס’ דף לו: “לא
Clarify the two questions of Tosfos on Rashi
Major Question:
Rashi sources the איסור שהייה to הטמנה בדבר המוסיף הבל which the Gemara explains is prohibited because we are considered שמא יחתה. Tosfos argues on Rashi and says the prohibition is because שמא יחתה. How is Tosfos’ explanation different from Rashi?
Why does raking out the coals or placing ashes on the גפת ועצים permit one to place cooked food on the Kirah?
Learn “ר”ן “או עד שיתן האפר
Note the differences between the questions Tosfos asks in Rashi and the the questions the Ran asks on Rashi.
What is the difference between Rashi and the Ran?
Learn בית יוסף & ב”ח ס’ רנ”ג סע’ א (I will show you exact piece)