أَنَّ النَّبِيَّ صلى الله عليه وسلم كَانَ إِذَا اغْتَسَلَ مِنَ الْجَنَابَةِ بَدَأَ فَغَسَلَ يَدَيْهِ، ثُمَّ يَتَوَضَّأُ كَمَا يَتَوَضَّأُ لِلصَّلاَةِ، ثُمَّ يُدْخِلُ أَصَابِعَهُ فِي الْمَاءِ، فَيُخَلِّلُ بِهَا أُصُولَ شَعَرِهِ ثُمَّ يَصُبُّ عَلَى رَأْسِهِ ثَلاَثَ غُرَفٍ بِيَدَيْهِ، ثُمَّ يُفِيضُ الْمَاءَ عَلَى جِلْدِهِ كُلِّهِ.
Aishah reported that when the Prophet ﷺ performed the ritual bath (ghusl) because of janabah, he would begin by washing his hands. Then he would perform ablution (wudu) as he did for the prayer. Then he would put his fingers into the water …
also in Sahih al-Bukhari 262, Sahih al-Bukhari 272, Sahih al-Bukhari 273