Reference for Niddah 85:26

שכבת זרע אמר רחמנא בראויה להזריע

Now this ruling which was quite obvious to Samuel was a matter of enquiry for Raba. For Raba enquired: What is the law where the detachment of the semen was perceived but its emergence was not felt?<span class="x" onmousemove="('comment',' Is uncleanness thereby conveyed or not? ');">²⁵</span>

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