Reference for Bava Batra 274:2

אלא מיפק דכולי עלמא לא פליגי דנפיק ביה מכרה או אכלה באנו למחלוקת רבי ורבן שמעון בן גמליאל

therewith, for what [other purpose] was the thing given to him!<span class="x" onmousemove="('comment',' Not being allowed to consume the fruit, the only other purpose for which one can use an ethrog is for the performance of the commandment. ');">³</span> But [it is obvious] that no one [can]<span class="x" onmousemove="('comment',' Lit., 'all the world do not'. ');">⁴</span>

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