Reference for Zevachim 128:4

וניתני או אידי ואידי דמזבח או אידי ואידי דגברא קשיא:

means the right of the altar, while 'left'<span class="x" onmousemove="('comment',' In the first clause.');">⁷</span> means the left of the person.<span class="x" onmousemove="('comment',' Standing in front of the altar.');">⁸</span> Then let him teach either both with reference to the altar or both with reference to the person?

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