Reference for Shabbat 248:12
<big><strong>גמ׳</strong></big> אמר רב יהודה אמר שמואל מחלוקת שנשברו מערב שבת דמר סבר מעין מלאכתן אין מעין מלאכה אחרת לא ומר סבר אפילו מעין מלאכה אחרת
<b><i>MISHNAH</i></b>. ALL UTENSILS WHICH MAY BE HANDLED ON THE SABBATH, THEIR FRAGMENTS MAY BE HANDLED TOO,<span class="x" onmousemove="('comment',' Lit., 'with them'. (The words are, however, rightly omitted in MS.M.] ');"><sup>22</sup></span> PROVIDED, HOWEVER, THAT THEY CAN PERFORM SOMETHING IN THE NATURE OF WORK. [THUS]: THE FRAGMENTS OF A KNEADING TROUGH [THAT CAN BE USED] TO COVER THE MOUTH OF A BARREL THEREWITH, [AND] THE FRAGMENTS OF A GLASS, TO COVER THEREWITH THE MOUTH OF A CRUSE. R. JUDAH MAINTAINED: PROVIDED THAT THEY CAN PERFORM SOMETHING IN THE NATURE OF THEIR OWN [FORMER] WORK;<span class="x" onmousemove="('comment',' I.e., similar to that performed by the whole utensil. ');"><sup>23</sup></span>