Reference for Bava Kamma 238:6
ת"ר אין לוקחין מן הסורק מוכין מפני שאינו שלו ובמקום שנהגו להיות שלו לוקחין ובכל מקום לוקחין מהן כר מלא מוכין וכסת מלאה מוכין מאי טעמא קננהו בשינוי
'[He must] not use [of the cloth for stretching or hackling] more than three widths of a seam.' R. Jeremiah asked: Does [the preliminary drawing of the] needle to and fro count as one stitch, or does it perhaps count as two stitches? — Let it stand undecided. 'He may straighten it out lengthways but not breadthways.' But was it not taught to the contrary? — There is no difficulty, as the former statement refers to a garment and the latter refers to a girdle.<span class="x" onmousemove="('comment',' [Of which only the ends hanging down are visible and these alone require straightening out.] ');"><sup>2</sup></span>