Reference for Arakhin 35:7

לכדתניא

etc.], therefore the text states: 'He being a witness', and he has singled them out.<span class="x" onmousemove="('comment',' He must single out those whom he adjures to give testimony on his behalf, because the Biblical 'He being a witness' indicates that a definite person must be involved. When the adjurer says: If someone among you knows etc., he speaks in general terms, hence does not affect those few who know among the majority who do not. But if he said: Whosoever of you knows, then he is addressing himself individually to each who does, hence he does oblige those who can give testimony on his behalf, to do so.');">⁴</span>

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