Reference for Niddah 29:28

מכאן ולהבא ורבנן היא

THE SAGES, HOWEVER, AGREE WITH R. AKIBA THAT ONE WHO OBSERVED A BLOODSTAIN. Rab explained: [She conveys UNCLEANNESS] retrospectively and the ruling is that of R. Meir.<span class="x" onmousemove="('comment',' Who in regard to bloodstains adopts (supra 5a and infra 52b) the more restrictive view. ');">²⁶</span>

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