Reference for Chullin 108:1

וחזייה לדרב מתנא דאתיא בזה הכלל מאי טעמא

He saw, however, that R'Mattena's case might be admitted [as a trefah] under the clause 'This is the rule',<span class="x" onmousemove="('comment',' Which clause was added for the sole purpose of including other defects not specifically mentioned.');">¹</span>

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