Reference for Menachot 62:4

בעי רב יהודה בר אבא בין דף לדף בין שיטה לשיטה מאי תיקו

It is [permitted to sew it] only with sinews but not with thread. R'Judah B'Abba raised the question: How is it if [the rent extended] between the columns<span class="x" onmousemove="('comment',' I.e., to such an extent that had it been in a column it would have gone beyond three lines of script. The question is whether it may be sewn together or not.');">⁴</span>

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