Reference for Pesachim 128:14

שחט ישראל וקבל הכהן וכו': לא סגיא דלאו ישראל היא גופא קמ"ל דשחיטה בזר כשירה וקבל הכהן הא קמשמע לן מקבלה ואילך מצות כהונה

But it was taught: And [the priest] shall burn then,:<span class="x" onmousemove="('comment',' Lev. III, 16.');">¹²</span> [this teaches] that all of it must be [burnt] simultaneously.<span class="x" onmousemove="('comment',' All the parts of the sacrifice which are burnt on the altar (called emurim) must be burnt at the same time. Here, however, the kidneys would be burnt separately.');">¹³</span>

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