Bulugh al-Maram, Book 1, Hadith 128 (English) ⓘ

Narrated ‘Aisha (rad): Whenever Allah’s Messenger took Ghusl (bath) after sexual intercourse, he would begin by washing his hands, then pour water with his right hand on his left hand and wash his sexual organ. He would then perform ablution, then take some water and run his fingers through the roots of the hair. Then he would pour three handfuls on his head, then pour water over the rest of his body and subsequently wash his feet. [Agreed upon and this version is of Muslim]

وَعَنْ عَائِشَةَ رَضِيَ اَللَّهُ عَنْهَا قَالَتْ: { كَانَ رَسُولُ اَللَّهِ ‏- صلى الله عليه وسلم ‏-إِذَا اِغْتَسَلَ مِنْ اَلْجَنَابَةِ يَبْدَأُ فَيَغْسِلُ يَدَيْهِ, ثُمَّ يُفْرِغُ بِيَمِينِهِ عَلَى شِمَالِهِ, فَيَغْسِلُ فَرْجَهُ, ثُمَّ يَتَوَضَّأُ, ثُمَّ يَأْخُذُ اَلْمَاءَ, فَيُدْخِلُ أَصَابِعَهُ فِي أُصُولِ اَلشَّعْرِ, ثُمَّ حَفَنَ عَلَى رَأْسِهِ ثَلَاثَ حَفَنَاتٍ, ثُمَّ أَفَاضَ عَلَى سَائِرِ جَسَدِهِ, ثُمَّ غَسَلَ رِجْلَيْهِ } مُتَّفَقٌ عَلَيْهِ, وَاللَّفْظُ لِمُسْلِم ٍ (145)‏.‏ ‏2 ‏- صحيح.‏ رواه البخاري (248)‏، ومسلم (316)‏، وبما أن المؤلف ساق لفظ مسلم فعنده بعد قول: "أصول الشعر" إضافة وهي قولها: "حتى إذا رأى أن قد استبرأ".‏