Reference for Pesachim 128:12

כהנים עומדין שורות וכו': מאי טעמא אילימא דילמא שקלי דדהבא ומעיילי דכספא הכא נמי דילמא שקלי בר מאתן ומעיילי בר מאה אלא דהכי שפיר טפי:

He [thereupon] took a kidney from each, and six-hundred-thousand pairs of kidneys were found there, twice as many as those who departed from Egypt, excluding those who were unclean and those who were on a distant journey; and there was not a single Paschal lamb for which more than ten people had not registered; and they called it, 'The Passover of the dense throngs.' 'He took a kidney'! but it required burning [on the altar]? He burned them subsequently.<span class="x" onmousemove="('comment',' After the event.');">¹⁰</span>

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