105. Come and behold. It is written, "If there be among you any man who is not clean by reason of uncleanliness that chances by night..." (Devarim 23:11) what should he do? The verse continues, "when evening comes on, he shall bathe himself in water..." (Ibid. 12) But if he becomes defiled through any other SEVERE cause, like gonorrhea or leprosy on the impurity of menstrual flow, which include two kinds of defilement, then the ritual immersion FOR CLEANSING HIMSELF FROM THE NOCTURNAL POLLUTION AT EVENING is not sufficient. UNDER THESE CIRCUMSTANCES, HE SHOULD KEEP PURITY FOR SEVEN DAYS. THEN HE SHOULD IMMERSE AGAIN. THERE IS NO DIFFERENCE BETWEEN HE WHO experienced nocturnal pollution before he was defiled with the other kind of corruption and he who was defiled only afterward.