Reference for Yoma 127:9

ור' יוחנן מיעט רחמנא בהם הם הוא דכי עבר מומן ירצו הא כל דחויין הואיל ונדחו נדחו

it was never fit at all. Here it was once fit and then rejected? - Rather is this the reason of Rab's view: He infers it from an animal afflicted with a passing blemish: An animal afflicted with a passing blemish surely although now unfit, yet when it is fit again, is quite in order.

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