"When Messenger of Allah ﷺ departed from ʿArafat, he turned towards a mountain pass where he answered the call of nature. (After he had finished) I poured water and he performed ablution and then I said to him, "O Messenger of Allah ﷺ! Will you offer the prayer?" He replied, "The Musalla (place of the prayer) is ahead of you (in Al-Muzdalifa).  

أَنَّ رَسُولَ اللَّهِ ﷺ لَمَّا أَفَاضَ مِنْ عَرَفَةَ عَدَلَ إِلَى الشِّعْبِ فَقَضَى حَاجَتَهُ قَالَ أُسَامَةُ بْنُ زَيْدٍ فَجَعَلْتُ أَصُبُّ عَلَيْهِ وَيَتَوَضَّأُ فَقُلْتُ يَا رَسُولَ اللَّهِ أَتُصَلِّي فَقَالَ الْمُصَلَّى أَمَامَكَ  

I was in the company of Messenger of Allah ﷺ on one of the journeys and he went out to answer the call of nature (and after he finished) I poured water and he performed ablution; he washed his face, forearms and passed his wet hand over his head and over the two Khuff (socks made from thick fabric or leather).  

أَنَّهُ كَانَ مَعَ رَسُولِ اللَّهِ ﷺ فِي سَفَرٍ وَأَنَّهُ ذَهَبَ لِحَاجَةٍ لَهُ وَأَنَّ مُغِيرَةَ جَعَلَ يَصُبُّ الْمَاءَ عَلَيْهِ وَهُوَ يَتَوَضَّأُ فَغَسَلَ وَجْهَهُ وَيَدَيْهِ وَمَسَحَ بِرَأْسِهِ وَمَسَحَ عَلَى الْخُفَّيْنِ