Reference for Niddah 53:42

אמר להו רב פפא

follows the view he expressed elsewhere. For it was taught: If some earth fell into a ladleful of corpse-mould [the latter remains] unclean, but R. Simeon holds it to be clean. What is R. Simeon's reason? — Raba<span class="x" onmousemove="('comment',' So MS.M. and BaH. Cur. edd., 'Rabbah'. ');">³⁸</span>

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