Reference for Bava Kamma 237:24
<big><strong>גמ׳</strong></big> ת"ר לוקחין מוכין מן הכובס מפני שהן שלו הכובס נוטל שני חוטין העליונים והן שלו
<b><i>MISHNAH</i></b>. SHREDS [OF WOOL] WHICH ARE TAKEN OUT BY THE WASHER BELONG TO HIM<span class="x" onmousemove="('comment',' As the proprietor does surely not care about them. ');"><sup>40</sup></span> BUT THOSE WHICH THE CARDER REMOVES BELONG TO THE PROPRIETOR.<span class="x" onmousemove="('comment',' As they are of some importance to him. ');"><sup>41</sup></span> THE WASHER MAY REMOVE THE THREE THREADS AT THE EDGE] AND THEY WILL BELONG TO HIM, BUT ALL OVER AND ABOVE THAT WILL BELONG TO THE PROPRIETOR, THOUGH IF THEY WERE BLACK UPON A WHITE SURFACE, HE MAY REMOVE THEM ALL<span class="x" onmousemove="('comment',' As they spoil the appearance of the garment. ');"><sup>42</sup></span> AND THEY WILL BELONG TO HIM. IF A TAILOR LEFT A THREAD SUFFICIENT TO SEW WITH, OR A PATCH OF THE WIDTH OF THREE [FINGERS] BY THREE [FINGERS], IT WILL BELONG TO THE PROPRIETOR.<span class="x" onmousemove="('comment',' As they are of some importance to him. ');"><sup>41</sup></span> WHATEVER A CARPENTER REMOVES WITH THE ADZE BELONGS TO HIM,<span class="x" onmousemove="('comment',' V. p. 715, n. 9. ');"><sup>43</sup></span> BUT THAT WHICH HE REMOVES BY THE AXE BELONGS TO THE PROPRIETOR.<span class="x" onmousemove="('comment',' V. p. 715, n. 10. ');"><sup>44</sup></span> IF, HOWEVER, HE WAS WORKING ON THE PROPRIETOR'S PREMISES,<span class="x" onmousemove="('comment',' As a daily employee. ');"><sup>45</sup></span> EVEN THE SAWDUST BELONGS TO THE PROPRIETOR. <b><i>GEMARA</i></b>. Our Rabbis taught:<span class="x" onmousemove="('comment',' Cf. Tosef. XI. ');"><sup>46</sup></span> It is allowed to buy shreds [of wool] from the washer, as they are his.<span class="x" onmousemove="('comment',' V. p. 715, n. 9. ');"><sup>43</sup></span> The washer may remove the two upper threads and they will belong to him.