She said, "I used to wash the traces of seminal fluid from the garment of the Messenger of Allah ﷺ, and he would go out to pray while the water spots were still visible on his garment."In another narration, "The Messenger of Allah ﷺ would wash the semen, then go out to pray in that same garment while I could still see the marks of the washing on it."
قالت: كنت أغسل الجنابة من ثوب رسول الله ﷺ، فيخرج إلى الصلاة، وإن بقع الماء في ثوبه. وفي رواية: إن رسول الله ﷺ كان يغسل المني، ثم يخرج إلى الصلاة في ذلك الثوب، وأنا أنظر إلى أثر الغسل فيه.
Bukhari narrated it in the Book of Wudu (229, 230, 231, 232), and Muslim in the Book of Purification (289), both through the route of Amr bin Maymun, who said, "I asked Sulayman bin Yasar about semen that gets on a man's garment, should he wash it off or wash the whole garment?" He said, "Ayesha told me," and he mentioned the hadith.