Reference for Eruvin 204:8
<big><strong>מתני׳</strong></big> מחזירין רטיה במקדש אבל לא במדינה אם בתחילה כאן וכאן אסור:
may not be re-inserted in either place;<span class="x" onmousemove="('comment',' V. p. 710, n. 15.');"><sup>26</sup></span> the former prohibition<span class="x" onmousemove="('comment',' That against the insertion of a lower pivot into its socket in the country (cf. Rashi) .');"><sup>27</sup></span> being a preventive measure against the possibility of one's driving it into its socket by force; and should one drive It in, the obligation of a sin-offering is incur The pivot of the door of a cistern, a cellar or an annexe<span class="x" onmousemove="('comment',' Since they are within, or attached to the ground.');"><sup>28</sup></span> may not be re-inserted in the socket,<span class="x" onmousemove="('comment',' Any addition to such a structure (cf. prev. n.) is regarded as 'building'.');"><sup>29</sup></span>