Reference for Chullin 189:8

א"ל

Some there are who give this version: Rabbi said: 'Are we to prohibit all the meat stalls because of that fool who wanted to annoy his fellow'?<span class="x" onmousemove="('comment',' We assume therefore that he lied to his fellow merely in order to annoy him, but that he did not actually sell the gentile trefah meat.');">³</span>

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