Reference for Chullin 161:26

ואמר רבא ואמרי לה כדי

according to R'Simeon, the second animal is valid.<span class="x" onmousemove="('comment',' For the slaughtering of the first animal was no slaughtering and the second animal was thus permitted to be slaughtered this day in the Sanctuary.');">¹¹</span>

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