Reference for Zevachim 14:2

ואמר רבא עולה ששחטה שלא לשמה אסור לזרוק דמה שלא לשמה

This follows either from Scripture or by reason. If you will, it is [deduced from] a text: That which is gone out of thy lips thou shalt observe, etc.<span class="x" onmousemove="('comment',' Deut. XXIII, 24.');">²</span>

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