Reference for Bava Kamma 139:6
אמר אביי ואי כתיב ביה למחצה לשליש ולרביע מיגו דמשתעי דינא אפלגא משתעי דינא אכולה
'You have no claim against me'. But Abaye said: If it is written, 'You will be entitled to a half or a third or a fourth of the claim', it would be valid, for since he is entitled to litigate regarding the half, he is also entitled to litigate regarding the whole.<span class="x" onmousemove="('comment',' V. B.M. 8a. ');"><sup>5</sup></span>
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