Reference for Eruvin 138:14
היכי דמי אי דבטיל ביתו אמאי אסור אי דלא בטיל חצירו אמאי שריא הכא במאי עסקינן כגון שביטל רשות חצירו ולא ביטל רשות ביתו וקא סברי רבנן המבטל רשות חצירו רשות ביתו לא ביטל דדייר איניש בבית בלא חצר
AND ALSO ACQUIRE THE SHARES OF OTHERS<span class="x" onmousemove="('comment',' Which they presented to him.');"><sup>34</sup></span> WHILE TWO TENANTS MAY PRESENT THEIR SHARES BUT MAY NOT ACQUIRE ANY.<span class="x" onmousemove="('comment',' Because, while the courtyard is their common domain, their houses are their individual property and it is forbidden to carry objects from a private house into a courtyard which belongs to another tenant as well as to its owner.');"><sup>35</sup></span> WHEN MUST ONE'S SHARE BE PRESENTED?<span class="x" onmousemove="('comment',' To one's neighbour, so that the use of the courtyard shall be unrestricted.');"><sup>36</sup></span>