WHEN IS THE OBLIGATION TO TITHE AVOIDED? (Yerushalmi Ma'asros Perek 3 Halachah 1 Daf 13b)
רבי עולא בר ישמעאל בשם רבי לעזר רבי ורבי יוסי בי רבי יהודה היו מכניסין את הכלכלה לאחורי הגגות ראה אותן רבי יודה בי רבי אלעאי אמר להן ראו מה ביניכם לראשונים רבי עקיבה היה לוקח שלשה מינין בפרוטה בשביל לעשר מכל מין ומין ואתם מכניסין את הכלכלה לאחורי הגגות.
(R. Ulla bar Yishmael citing R. Elazar): Rebbi and R. Yosi bei R. Yehuda were bringing in their produce behind the roofs (in order to avoid the produce becoming obligated in Maaser). R. Yehuda bei R. Ilai saw them and said to them, "Notice the difference between you and the earlier generations - R. Akiva (cherished the Mitzvah so much, that he) would buy three different species with a Peruta, in order to tithe each species; and you are bringing in your produce behind the roof!''
מה לי לאחורי הגגות אפילו הכניסם בחצירו לאוכלן בראש גגו ולא רבי יוסי בי רבי יהודה היא.
Question: Why did they bring it in behind their roofs? Even if they would have brought it through their courtyards to eat on top of their roofs, doesn't R. Yosi bei R. Yehuda say that they are exempt!
בגין רבי דהוה עימיה
Answer: Since Rebbi was with him (and he obligates in such a case).
חמתון חד סבא אמר לון יהבון לי אתון אמרון ליה אין. אמר לון לאבוכון דבשמיא לא יהביתון אלא לי.
A certain Elder saw them and asked them to give him a fig and they agreed. He said to them, "You don't give to your Father in Heaven but you give to me?!''
רבי יוחנן כרבי ורבי שמעון בר לקיש כרבי יוסי בי רבי יודה.
R. Yochanan follows Rebbi and R. Shimon bar Lakish follows R. Yosi bei R. Yehuda. (R. Yochanan and Reish Lakish disagreed earlier (Chulin 135(c)) over when fruits that were not picked for Shabbos use and Shabbos arrived. R. Yochanan said that Shabbos makes it Tevel and Reish Lakish said that it does not. They disagree within the dispute between Rebbe and R. Yosi bei R. Yehuda. R. Yochanan follows Rebbe, saying that just as concerning produce transferred through a courtyard, even if his intent is to eat them in a place that is exempt, they become obligated; so too fruits that were picked for non-Shabbos use, even though he doesn't intend to eat them on Shabbos, Shabbos establishes their obligation. And the converse is true, that Reish Lakish follows R. Yosi bei R. Yehuda.)
[דף כג עמוד א (עוז והדר)] רבי יוחנן כרבי אפילו דיסבור כרבי יוסי בי רבי יודה חומר היא בשבת שכן נשרים שנשרו מאיליהן אסורים.
R. Yochanan could even agree with R. Yosi bei R. Yehuda - it's a stringency of Shabbos that it can establish an obligation, as we find that even if fruits merely fell (rather than being picked) from a tree before Shabbos, Shabbos establishes their obligation in Maaser. (But in contrast, if fruits fell from a tree in a courtyard, the courtyard doesn't establish their obligation.)
רבי שמעון בן לקיש כרבי יוסי בי רבי יודה אפילו דיסבור כרבי חומר היא בחצר בית שמירה דאמר רבי [דף יד עמוד א] יוחנן מקח וחצר ושבת אינן תורה רבי אימי בשם רבי שמעון [בן לקיש] המחוור שבכולן זה חצר בית שמירה.
Similarly, R. Shimon ben Lakish could even agree with Rebbi - a courtyard has a stringency in its ability to obligate Maaser (that does not apply to Shabbos) - although R. Yochanan said that the obligation established by an acquisition, a courtyard and Shabbos are Rabbinic; R. Imi cited from R. Shimon ben Lakish that the one that is clearest (to be from the Torah) is the protected courtyard.
רבי יוחנן בשם רבי שמעון בן יוחי היו לו שתי חצירות אחת במגדלא ואחת בטיבריא העבירו בזו שבמגדלא לאוכלן בזו שבטיבריא מכיון שהעבירן דרך היתר מותר.
(R. Yochanan citing R. Shimon ben Yochai): If a person had two courtyards, one in Magdala and one in Tiveria and he transferred his produce through the courtyard in Magdala to eat it in the courtyard in Tiveria - since he transferred it through a place without an obligation, it's obligation wasn't established.
אתיא דרבי שמעון בן יוחי כרבי יוסי בי רבי יודה ורובה מן דרבי יוסי בי רבי יודה.
R. Shimon ben Yochai follows the view of R. Yosi bei R. Yehuda but his law goes even further...
מה דאמר רבי יוסי בי רבי יודה בעומד במקום פטור. מה דאמר רבי שמעון בן (לקיש)[יוחי] בעומד במקום חיוב. מכיון שהעבירן דרך היתר מותר.
R. Yosi bei R. Yehuda reasons that a person may only eat it in a place that is exempt (e.g. on top of his roof). R. Shimon ben Yochai even permits it in a place that is obligated (e.g. the courtyard in Tiveria), since it was transferred through a place that is exempt.
רבי אליעזר דרובא מן תרוויהון דרבי ליעזר אמר מכיון שהתחיל בהן דרך היתר מותר.
R. Eliezer goes even further than both of them, as he says that since he began in a way that they are exempt, they remain exempt. (This opinion appears in a Mishnah in Maseches Terumos (8:2) (Chulin 96-1(a)), where he says that if a person was eating a bunch of grapes and he entered from the garden into the courtyard (thereby obligating the grapes in Terumos and Ma'asros), he may finish eating it in the garden.
[דף כג עמוד ב (עוז והדר)] ניחא לא מן הסל ולא מן הקופה ולא מן המוקצה כמה דתימר תמן מלקט אחת אחת ואוכל ואם צירף חייב ואמור אוף הכא כן.
Question: (The Mishnah taught (Chulin 140(b)) that if one brought his workers to the field...if he is required to feed them, they may eat one at a time, but not from the basket, the large boxes or the drying area.) It's understandable that they may not eat from the basket or large boxes (since there is a combining of the fruits in the container, thereby obligating them); but when he spread them out in the drying area, they aren't yet completed and they are like fruits still attached to the tree, about which it's taught that he may pick them one at a time and eat but only if he picked several together, they are obligated...?
א''ר יצחק מוקצה עשו אותה כמצורף.
Answer (R. Yitzchak): The fruits in the drying area are considered to be combined together.