Reference for Niddah 52:28

דלמא כאן בנפל כאן בבן קיימא

The first remained silent. Said the other to him: Is it not possible that one statement<span class="x" onmousemove="('comment',' According to which a second child might be born three or more days after the birth of the first one. ');">²⁶</span>

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