Reference for Gittin 98:5

אלא מעתה יהא בזיבורית א"כ אתה נועל דלת בפני לווין

and its later clause gives the reason for the earlier,<span class="x" onmousemove="('comment',' Although the rule laid down in the earlier derives from the Torah and not merely from the Rabbis. ');">⁵</span>

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