I stayed in the house of 'A'isha and had a wet dream (and perceived its effect on my garment), so (in the morning) I dipped both (the clothes) in water. This (act of mine) was watched by a maid-servant of A'isha and she informed her. She (Hadrat A'isha) sent me a message: Whatprompted you to act like this with your clothes? He (the narrator) said: I told that I saw in a dream what a sleeper sees. She said: Did you find (any mark of the fluid) on your clothes? I said: No. She said: Had you found anything you should have washed it. Incase I found that (semen) on the garment of the Messenger of Allah ﷺ dried up, I scraped it off with my nails. (Using translation from Muslim 290)   

عَائِشَةَ ؓ فَاحْتَلَمْتُ فِي ثَوْبِي فَغَمَسْتُهُمَا فِي الْمَاءِ فَرَأَتْنِي جَارِيَةٌ لِعَائِشَةَ ؓ فَأَخْبَرَتْهَا فَبَعَثَتْ إِلَيَّ عَائِشَةُ ؓ فَقَالَتْ مَا حَمَلَكَ عَلَى مَا صَنَعْتَ بِثَوْبِكَ؟ قَالَ قُلْتُ رَأَيْتُ مَا يَرَى النَّائِمُ فِي مَنَامِهِ قَالَتْ فَهَلْ رَأَيْتَ فِيهَا شَيْئًا؟ قُلْتُ لَا قَالَتْ فَلَوْ رَأَيْتَ شَيْئًا غَسَلْتَهُ وَلَقَدْ رَأَيْتُنِي وَإِنِّي لَأَحُكُّهُ مِنْ ثَوْبِ رَسُولِ اللهِ ﷺ يَابِسًا بِظُفُرِي