سَأَلْتُ عَائِشَةَ عَنِ الْمَنِيِّ، يُصِيبُ الثَّوْبَ فَقَالَتْ كُنْتُ أَغْسِلُهُ مِنْ ثَوْبِ رَسُولِ اللَّهِ صلى الله عليه وسلم، فَيَخْرُجُ إِلَى الصَّلاَةِ وَأَثَرُ الْغَسْلِ فِي ثَوْبِهِ بُقَعُ الْمَاءِ.
Sulayman ibn Yasar reported: I asked Aishah about semen that gets on the garment. She said, “I used to wash it from the garment of the Messenger of Allah ﷺ. Then he would go out to the prayer, and the trace of the washing on his garment …
also in Sahih al-Bukhari 229, Sahih al-Bukhari 231