Rabbi Baruch Bodenheim:  Gemara Shabbos: Perek Kirah, יום שלישי, Av 18, Daf 40b (08/12/25)

Halachic Conclusion 

Cooking on Shabbos Raw Fruits, Vegetables, Water & Oil

Quickly review the גמרא דף מ”: “א”ר יהודה אמר שמואל ( middle of the wide lines) until א”ר יצחק בר אבדימי 

In Conclusion:

Is the an איסור דאורייתא to cook on Shabbos fruits or vegetables which are edible raw but will be improved by cooking it?

Write out the machlokes between the Mishna Berura and Rebbe Akiva Eiger in regards to this question and how to explain the words of the Rambam 

See רמב”ם ה’ שבת פרק ט הלכה ג “המבשל על האור and מגיד משנה

https://hebrewbooks.org/pdfpager.aspx?req=14278&st=&pgnum=38

Learn שו”ע ס’ רנ”ד סע’ ד

See שער הציון ס’ שי”ח אות קיד

https://hebrewbooks.org/pdfpager.aspx?req=60388&st=&pgnum=280&hilite=

See מ”א ס’ רנ”ד ס”ק יד

https://hebrewbooks.org/pdfpager.aspx?req=14325&st=&pgnum=29

See ה’ רע”א שו”ע ס’ רנ”ד ס”ק י”ד

Note the two different ways to explain the Rambam 

See the אגלי טל אופה אות י who summarizes the two opinions 

https://hebrewbooks.org/pdfpager.aspx?req=14401&st=&pgnum=247

Learn רמב”ם ה’ שבת פרק ט הלכה ו who defines the Melacha of Bishul as softening something hard or hardening something soft through the application of heat.

https://hebrewbooks.org/pdfpager.aspx?req=14278&st=&pgnum=40

According to the Rambam why is heating water a violation of cooking?

See the אגלי טל אופה אות י ס”ק יט אות יב & י”ג

https://hebrewbooks.org/pdfpager.aspx?req=14401&st=&pgnum=248

Clarify the argument between the שער הציון and the אגלי טל explanation for Rebbe Akiva Eiger why water which is drinkable at room temperature is a violation of cooking.

Continue learning the גמרא דף מ: “א”ר יצחק בר אבדימי (middle of the wide lines) until  “היכי עביד הכי” 

Learn the רי”ף who has a different Girsa in the third Halacha.

https://hebrewbooks.org/pdfpager.aspx?req=37953&st=&pgnum=587

Learn the ר”ן who explains the difference. 

Learn תוס’ “ושמע מינה

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