Reference for Zevachim 124:6
א"ל (שמות כז, א) רבוע כתיב והא מיבעי ליה דמרבע רבועי מי כתיב מרובע וליטעמיך מי כתיב רבוץ א"ל רבוע כתיב דמשמע הכי ומשמע הכי
Yet say: the side in the north and the face in the north?<span class="x" onmousemove="('comment',' Like a man sitting upright.');"><sup>14</sup></span> - Said Raba: Throw a man on his face.<span class="x" onmousemove="('comment',' It must be like a man lying face downward-hence the face in the opposite direction to the legs.');"><sup>15</sup></span> Said Abaye to him: On the contrary, let the man sit upright? - It is written, [The altar shall be] rabua'.<span class="x" onmousemove="('comment',' E.V. 'foursquare'. Ex. XXVII, 1. He connects rabua' with raba', to lie down, and interprets: the altar shall be like a man lying down.');"><sup>16</sup></span>