Reference for Niddah 85:14

כל האוחז באמה ומשתין כאילו מביא מבול לעולם

[which implies that no uncleanness is conveyed] unless his issue emerged 'out of his flesh'; ONE WHO EMITTED SEMEN, because It is written, And if the flow of seed go out from a man.<span class="x" onmousemove="('comment',' Ibid. 16. Cf. prev. n. ');">¹³</span>

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