Reference for Niddah 10:32

מגעה לא מטמא אדם אף משכבה לא מטמא אדם

are regarded as unclean. R. Simeon b. Gamaliel ruled: The man is told, 'Do it again'<span class="x" onmousemove="('comment',' Sc. to wrap himself again in his cloak in the same place and position in which he did it first. ');">³⁰</span>

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