I asked Sulaiman b. Yasar whether the semen that gets on to the garment of a person should be washed or not. He replied: A'isha told me: The Messenger of Allah (ﷺ) washed the semen, and then went out for prayer in that very garment and I saw the mark of washing on it.
Reference: Sahih Muslim 289a In-book : Book 2, Hadith 138 USC-MSA web (English) : Book 2, Hadith 570 (deprecated)
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