Reference for Chullin 48:12

כל שעומד על רגלו אחת וחולץ מנעלו ונועל מנעלו

and to pronounce the priestly benediction.<span class="x" onmousemove="('comment',' Lit., 'to lift up his hands'. Of course, provided he is a priest. V. Num. VI, 22-27.');">⁸</span>

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