Reference for Chullin 180:18

משום שנאמר (מלאכי א, ח) הקריבהו נא לפחתך

'There was an ash-heap in the middle of the altar and sometimes there were on it about three hundred kor<span class="x" onmousemove="('comment',' A measure of capacity equal to 30 se'ah.');">¹⁰</span>

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