Reference for Temurah 62:15

קתני אעיקר זיבחא

But is not the exchange itself a dedication for the altar, and we have learnt: One exchange cannot effect another exchange? - [The Mishnah] refers to original dedications.<span class="x" onmousemove="('comment',' The first dedication and not an exchange which is the second dedication arising from an exchange with the first.');">¹¹</span>

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