Very quickly review the conclusion of the גמרא דף לח (between the first and second Mishna)
Learn תוספת “מאי
Note – how the Ran answered the question of Tosfos
In conclusion, what is the halacha regarding a mitzvah דאורייתא?
Is one obligated to interrupt an activity he is engaged in to perform the mitzvah?
Learn רמב״ם הלכות קריאת שמע פרק ב הלכה ו and the ראב”ד who asks multiple questions on the Rambam from our Gemara.
https://hebrewbooks.org/pdfpager.aspx?req=58957&st=&pgnum=172
Major Questions:
The Mishna Shabbos 9b and our Gemara concludes that for a mitzvah דאורייתא one needs to interrupt a meal to recite krias shema even when there is time after the meal.
How could the Rambam rule that one can continue his meal and need not interrupt to recite krias shema even if there will not be time to recite it after the meal?
Learn כסף משנה who gives two answers.
See ט”ז אורח חיים ס’ ע סעיף ה who asks multiple questions on the kesef mishna / Beis Yosef.
https://hebrewbooks.org/pdfpager.aspx?req=14326&st=&pgnum=120
See ב’ הגר”א “ולהראב”ד on the Shulchan Aruch for an entirely new approach to explain the Rambam based on the question of Tosfos
https://hebrewbooks.org/pdfpager.aspx?req=14326&st=&pgnum=121
Learn שולחן ערוך אורח חיים ס’ ע סעיף ה with the משנה ברורה and “ביאור הלכה “היה
https://hebrewbooks.org/pdfpager.aspx?req=60386&st=&pgnum=215
What is the proper time and place to shake Lulav? – First thing in the morning in ones Sukkah or in shul right before reciting Hallel
Why?
See משנה ברורה ס’ תרנ”א ס”ק לד and שער הציון אות מג
https://hebrewbooks.org/pdfpager.aspx?req=60391&st=&pgnum=252
And משנה ברורה ס’ תרנ”ב ס”ק ד
https://hebrewbooks.org/pdfpager.aspx?req=60391&st=&pgnum=256
Learn second משנה דף לח עמוד א and the Gemara until אמר רבא (last line)
Learn תוס’ “מי
Questions:
Is the concept of שאף הן היו באותו הנס a reason to obligate מדאורייתא or only מדרבנן?
Learn גמרא פסחים דף קח. “”ואמר רבי יהושע בן לוי נשים (last line until too line of דף קח עמוד ב
Learn רשב”ם דף קח: “שאף הן היו באותו הנס and תוספת “שאף” & “היו
Learn תוספת מגילה דף ד. “שאף
What’s the difference between the two answers offered by the end of Tosfos?