Reference for Yoma 137:1

וסיפא איצטריכא ליה פושטין ומקפלין ומניחין תחת ראשיהם

but it is necessary [to make special mention of sleep] on account of the last clause:<span class="x" onmousemove="('comment',' Which permits the sleeping on them, independent of any fear that impurity may occur in the sleep, since the garments were taken off the body.');">¹</span> they may take them off, fold them, and put them under the head.'

Jastrow

Jastrow

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