Reference for Eruvin 138:20

שאחד נותן רשות הא תו למה לי אי נותן תנינא אי נוטל תנינא

What is the reason? - Because he<span class="x" onmousemove="('comment',' By abstaining from taking out any object from his house into the courtyard or vice versa and by using the courtyard in connection with the other tenants' houses only.');">⁴⁴</span> is regarded as their guest. IF THEY PRESENTED THEIR SHARES TO HIM, HE IS PERMITTED THE UNRESTRICTED USE OF THE COURTYARD BUT THEY ARE FORBIDDEN.

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