Sahih Muslim Book - 3, Hadith - 718

حَدَّثَنَا يَحْيَى بْنُ يَحْيَى التَّمِيمِيُّ حَدَّثَنَا أَبُو مُعَاوِيَةَ عَنْ هِشَامِ بْنِ عُرْوَةَ عَنْ أَبِيهِ عَنْ عَائِشَةَ قَالَتْ كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِذَا اغْتَسَلَ مِنْ الْجَنَابَةِ يَبْدَأُ فَيَغْسِلُ يَدَيْهِ ثُمَّ يُفْرِغُ بِيَمِينِهِ عَلَى شِمَالِهِ فَيَغْسِلُ فَرْجَهُ ثُمَّ يَتَوَضَّأُ وُضُوءَهُ لِلصَّلَاةِ ثُمَّ يَأْخُذُ الْمَاءَ فَيُدْخِلُ أَصَابِعَهُ فِي أُصُولِ الشَّعْرِ حَتَّى إِذَا رَأَى أَنْ قَدْ اسْتَبْرَأَ حَفَنَ عَلَى رَأْسِهِ ثَلَاثَ حَفَنَاتٍ ثُمَّ أَفَاضَ عَلَى سَائِرِ جَسَدِهِ ثُمَّ غَسَلَ رِجْلَيْهِ.

It was narrated that 'Aishah said: "When the Messenger of Allah (s.a.w) performed Ghusl in the case of Janabah, he would start by washing his hands, then he would pour water with his right hand into his left and wash his private part. Then he would perform Wudu' as for prayer. Then he would take water (and pour it over his head) and make it reach the roots of his hair, using his fingers. When he saw that it was thoroughly wet, he would pour three handfuls of water over his head. Then he would pour water over the rest of his body, then he would wash his feet."