(Imām Bukhārī narrates): Abdullah bin Yusuf narrated to us, he said: Imam Malik informed us, from Hisham, from his father, from Hazrat Aisha (may Allāh be pleased with her), wife of the Prophet ﷺ, that
the Prophet ﷺ, when he performed the ghusl of janabah, would first wash his hands, then perform wudu as he performed wudu for prayer, then put his fingers into water and run them through the roots of his hair, then take three handfuls of water with his hands and pour them on his head, then pour water over his entire body.
حَدَّثَنَا عَبْدُ اللَّهِ بْنُ يُوسُفَ، قَالَ أَخْبَرَنَا مَالِكٌ، عَنْ هِشَامٍ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، زَوْجِ النَّبِيِّ صلى الله عليه وسلم
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.
Reference: Sahih Al Bukhari 248