Sunan an-Nasai Book 1, Hadith 245

أَخْبَرَنَا مَحْمُودُ بْنُ غَيْلاَنَ، أَنْبَأَنَا النَّضْرُ، قَالَ أَنْبَأَنَا شُعْبَةُ، قَالَ أَنْبَأَنَا عَطَاءُ بْنُ السَّائِبِ، قَالَ سَمِعْتُ أَبَا سَلَمَةَ، أَنَّهُ دَخَلَ عَلَى عَائِشَةَ - رضى الله عنها - فَسَأَلَهَا عَنْ غُسْلِ رَسُولِ اللَّهِ صلى الله عليه وسلم مِنَ الْجَنَابَةِ فَقَالَتْ كَانَ النَّبِيُّ صلى الله عليه وسلم يُؤْتَى بِالإِنَاءِ فَيَصُبُّ عَلَى يَدَيْهِ ثَلاَثًا فَيَغْسِلُهُمَا ثُمَّ يَصُبُّ بِيَمِينِهِ عَلَى شِمَالِهِ فَيَغْسِلُ مَا عَلَى فَخِذَيْهِ ثُمَّ يَغْسِلُ يَدَيْهِ وَيَتَمَضْمَضُ وَيَسْتَنْشِقُ وَيَصُبُّ عَلَى رَأْسِهِ ثَلاَثًا ثُمَّ يُفِيضُ عَلَى سَائِرِ جَسَدِهِ ‏.‏

Abu Salamah (narrated) that he entered upon 'Aishah and asked her about the Ghusl of the Messenger of Allah (ﷺ) from Janabah. She said:"A vessel would be brought to the prophet (ﷺ) then he would pour water on his hand three times and wash them, then he would pour water with his right hand onto his left and wash off whatever was on his thighs. Then he would wash his hands, rinse his mouth and nose, pour water on his head three times, then pour water over the rest of his body