Reference for Bava Batra 335:12

לא דכולי עלמא כופין והכא היינו טעמא דר"ש בן גמליאל דאמר ליה לא ניחא לי דתהוי זכותך גבי זכותי דדמית עלאי כי אריא ארבא:

[agree that] force is exercised, but the reason of Rabban Simeon b. Gamaliel here<span class="x" onmousemove="('comment',' Against the use of force in this case. ');">³³</span> is this: Because [one can] say to the other,<span class="x" onmousemove="('comment',' Lit., 'to him'. ');">³⁴</span> 'I do not like your rights to be at the side of my rights, for you appear to me as a lurking lion'.<span class="x" onmousemove="('comment',' Since a common document might lead to new arguments and quarrels. R. Simeon b. Gamaliel's view is that, in such a case, it is better to allow separate copies for each of the litigants if one of them had expressed a desire to have a copy of his own. ');">³⁵</span>

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