Mishkat al-Masabih · Book 4 · Hadith 1009, 1010
عَنْ أَبِي هُرَيْرَةَ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ خَرَجَ إِلَى الصَّلَاةِ فَلَمَّا كَبَّرَ انْصَرَفَ وَأَوْمَأَ إِلَيْهِمْ أَنْ كَمَا كُنْتُمْ. ثُمَّ خَرَجَ فَاغْتَسَلَ ثُمَّ جَاءَ وَرَأَسُهُ يَقْطُرُ فَصَلَّى بِهِمْ. فَلَمَّا صَلَّى قَالَ: «إِنِّي كُنْتُ جُنُبًا فنسيت أَن أَغْتَسِل» . رَوَاهُ أَحْمد وروى مَالك عَن عَطاء بن يسَار نَحوه…
Abu Huraira said: The Prophet (ﷺ) came out for prayer, but when he had said “God is most great” he went off, giving them a sign to stay where they were. He went away, and when he had bathed he came with his head dripping…