Reference for Niddah 114:50

אמר מר

The Master said, 'A bloodstain on her body, concerning which there is doubt whether it is unclean or clean, is regarded as unclean; on her shirt, when it is doubtful whether it is unclean or clean, is regarded as clean'. How is one to understand the circumstances? If it<span class="x" onmousemove="('comment',' The stain. ');">⁴²</span>

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