Reference for Eruvin 199:3
רבה אמר מותר להשתמש בהן דכל פחות מג' דארעא ארעא היא רב ששת אמר אסור להשתמש בהן דכיון דמכח איסור קאתי אסורין
are in the shape of a rocky crag.<span class="x" onmousemove="('comment',' Meshunitha is derived by Rashi from the came root as shen in shen sela', sc. the roots grew upwards and then bent downwards in the shape of a sloping hill, smaller roots branching out of the bigger ones.');"><sup>6</sup></span> those that grow upwards<span class="x" onmousemove="('comment',' From a section of a root that was higher than three handbreadths from the ground.');"><sup>7</sup></span> are forbidden,<span class="x" onmousemove="('comment',' Even according to the view of Rabbah, since hot11 roots and source are in a forbidden level.');"><sup>8</sup></span> those that grow downwards<span class="x" onmousemove="('comment',' From a root section below the level of three handbreadths.');"><sup>9</sup></span>