Reference for Niddah 9:21

אין ר"מ היא דמחמיר גבי כתמים

the law of the uncleanness of a stain?<span class="x" onmousemove="('comment',' Even after it had been discovered. ');">¹⁸</span>

Explore reference for Niddah 9:21. In-depth commentary and analysis from classical Jewish sources.