I heard Sulaiman bin Yasar talking about the clothes soiled with semen. He said that ʿAisha had said, "I used to wash it off the clothes of Messenger of Allah ﷺ and he would go for the prayers while water spots were still visible on them.
عَائِشَةُ كُنْتُ أَغْسِلُهُ مِنْ ثَوْبِ رَسُولِ اللَّهِ ﷺ ثُمَّ يَخْرُجُ إِلَى الصَّلاَةِ وَأَثَرُ الْغَسْلِ فِيهِ بُقَعُ الْمَاءِ