Reference for Eruvin 193:8

מה נפשך אי מחד גברא קא זבין לבדוק או שלש של יד או שלש של ראש

must be turned outwards?<span class="x" onmousemove="('comment',' Away from the person wearing them; all of which shows that the knot is all essential part of the tefillin. How then could it possibly be presumed that it could be replaced by a loop?');">¹⁷</span> - One could make the loop similar to the prescribed knot.<span class="x" onmousemove="('comment',' Lit., 'he makes a loop for them (the tefillin) similar to their knot' in the shape of the prescribed letter.');">¹⁸</span> R'Hisda citing Rab<span class="x" onmousemove="('comment',' MS.M. omits the last two words.');">¹⁹</span>

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