Reference for Bekhorot 61:40

ביחיד מומחה הכא נמי ביחיד מומחה

He may examine his holy sacrifices', [the reason being] because if he wished, he could ask for their release [from a scholar].<span class="x" onmousemove="('comment',' By pleading that the consecration was a mistake, thus finding a way out to free the animal from its sanctity. We therefore do not entertain the suspicion that he would declare the blemish to be a permanent one when it is transitory. This method, however, of releasing the animal from its holiness does not apply to a firstling which is hallowed from birth, and consequently there is room for suspicion here.');">²²</span>

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