Reference for Bava Kamma 148:6

אמרי הכא במאי עסקינן כגון שהוזמו על הטביחה תחילה

R. Idi b. Abin said: We have also learnt to the same effect:<span class="x" onmousemove="('comment',' In the case made out by Raba where a contradiction of the subject matter of evidence was followed by proof of an alibi. ');">⁵</span>

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