Reference for Eruvin 193:6

דעניב להו כעין קשירה דידהו

- R'Hisda replied: This proves that a loop is inadmissible<span class="x" onmousemove="('comment',' Or 'unfit'.');">¹²</span> in tefillin Abaye replied: R'Judah follows his view, expressed elsewhere,<span class="x" onmousemove="('comment',' Lit., 'which he said'.');">¹³</span> that a loop is like a proper knot.<span class="x" onmousemove="('comment',' And like the latter, is forbidden to be made on the Sabbath (cf. Shah. 113a) .');">¹⁴</span>

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