Reference for Eruvin 69:11

<big><strong>מתני׳</strong></big> נתגלגל חוץ לתחום נפל עליו גל או נשרף תרומה ונטמאת מבעוד יום אינו עירוב משחשיכה הרי זה עירוב

but here<span class="x" onmousemove="('comment',' In the Mishnah from Zabim under discussion.');">³⁶</span> we are dealing [with an object], the vibration of which was the direct result of the zab's strength.<span class="x" onmousemove="('comment',' If, for instance, he struck the object with his gloved fist or a piece of wood (so that there was no direct 'touch') and the object only vibrated but did not move from its place.');">³⁷</span> And it is this principle on which they differ. The Master<span class="x" onmousemove="('comment',' The first Tanna.');">³⁸</span>

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