Reference for Chullin 59:35

אמר ליה ר' ירמיה

From the verse: Their tongue is a sharpened arrow, it speaketh deceit.<span class="x" onmousemove="('comment',' Jer. IX. 7. Heb. , lit., 'an arrow thrust as in a slaughtering'. i.e., the cut in slaughtering should be wide open like the thrust of an arrow.');">²²</span>

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