Reference for Zevachim 126:1

ומקיפין ויורדין דרך שמאל חוץ מן העולה לג' אלו שהיו עולין ויורדין על העקב:

THEN THEY WENT ROUND [THE ALTAR]<span class="x" onmousemove="('comment',' For whatever they had to do, e.g., sprinkle the blood or arrange the wood pile.');">¹</span> AND DESCENDED BY THE LEFT, EXCEPT FOR THESE THREE, WHO ASCENDED AND DESCENDED BY RETRACING THEIR STEPS.<span class="x" onmousemove="('comment',' By the left. V. Suk. 48b.');">²</span>

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