Reference for Chullin 199:4

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was used;<span class="x" onmousemove="('comment',' All things which a man might sell by number, even though this is not the invariable practice with regard to them for a man might sell them by weight or by bulk too, are not neutralized in any quantity. Pieces of meat, too, a man might sell by number, and therefore would come within the category of substances which do not become neutralized in a larger quantity.');">³</span>

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