Reference for Niddah 106:9

אלא תני הכי

since her bloodstain should in no case be subject to greater restrictions than her observation.<span class="x" onmousemove="('comment',' In the latter case the uncleanness is retrospective for twenty-four hours only, while in the former it would go back to the time the article had been washed. ');">⁶</span>

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