وَعَنْ عَائِشَةَ رَضِيَ اَللَّهُ عَنْهَا
قَالَتْ: «كَانَ رَسُولُ اَللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَغْسِلُ اَلْمَنِيَّ، ثُمَّ يَخْرُجُ إِلَى اَلصَّلَاةِ فِي ذَلِكَ اَلثَّوْبِ، وَأَنَا أَنْظُرُ إِلَى أَثَرِ اَلْغُسْلِ فِيهِ»
The Messenger of Allah (sallallahu alayhi wa sallam) used to wash the semen and then go out for prayer in that (very) garment and I could still see the trace of the washing on it.
Bulugh al-Maram 31, Book 1, The Book of Purification, Hadith 31. 1 min read