Sahih al-Bukhari 272, 273
Narrated Hisham bin `Urwa:
(on the authority of his father) `Aisha said, "Whenever Allah's Messenger (ﷺ) took the bath of Janaba, he 
cleaned his hands and performed ablution like that for prayer and then took a bath and rubbed his hair, 
till he felt that the whole skin of the head had become wet, then he would pour water thrice and wash 
the rest of the body." `Aisha further said, "I and Allah's Messenger (ﷺ) used to take a bath from a single 
water container, from which we took water simultaneously."
حَدَّثَنَا عَبْدَانُ، قَالَ أَخْبَرَنَا عَبْدُ اللَّهِ، قَالَ أَخْبَرَنَا هِشَامُ بْنُ عُرْوَةَ، عَنْ أَبِيهِ، عَنْ عَائِشَةَ، قَالَتْ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم إِذَا اغْتَسَلَ مِنَ الْجَنَابَةِ غَسَلَ يَدَيْهِ، وَتَوَضَّأَ وُضُوءَهُ لِلصَّلاَةِ ثُمَّ اغْتَسَلَ، ثُمَّ يُخَلِّلُ بِيَدِهِ شَعَرَهُ، حَتَّى إِذَا ظَنَّ أَنْ قَدْ أَرْوَى بَشَرَتَهُ، أَفَاضَ عَلَيْهِ الْمَاءَ ثَلاَثَ مَرَّاتٍ، ثُمَّ غَسَلَ سَائِرَ جَسَدِهِ‏.‏ وَقَالَتْ كُنْتُ أَغْتَسِلُ أَنَا وَرَسُولُ اللَّهِ، صلى الله عليه وسلم مِنْ إِنَاءٍ وَاحِدٍ نَغْرِفُ مِنْهُ جَمِيعًا‏.‏