Reference for Eruvin 167:4

מאי לחצר אף לחצר ושניהן אסורין

- The meaning of TO THE COURTYARD is to the courtyard also, and both<span class="x" onmousemove="('comment',' The tenants of the courtyard as well as those of the gallery.');">¹⁰</span> are forbidden access to it. This<span class="x" onmousemove="('comment',' That TO THE COURTYARD means: Not only the tenants of the gallery but also those of the courtyard.');">¹¹</span>

Jastrow