(What is said regarding) a man who helps his companion to perform ablution (by pouring water for him)

Narrated Usama bin Zaid:

"When Allah's Messenger (ﷺ) departed from `Arafat, 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 Allah's Messenger (ﷺ) ! Will you offer the prayer?" He replied, "The Musalla (place of the prayer) is ahead of you (in Al-Muzdalifa).

حَدَّثَنِي مُحَمَّدُ بْنُ سَلاَمٍ، قَالَ أَخْبَرَنَا يَزِيدُ بْنُ هَارُونَ، عَنْ يَحْيَى، عَنْ مُوسَى بْنِ عُقْبَةَ، عَنْ كُرَيْبٍ، مَوْلَى ابْنِ عَبَّاسٍ عَنْ أُسَامَةَ بْنِ زَيْدٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم 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 ‏

‏‏.‏

Narrated Al-Mughira bin Shu`ba:

I was in the company of Allah's Messenger (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).

حَدَّثَنَا عَمْرُو بْنُ عَلِيٍّ، قَالَ حَدَّثَنَا عَبْدُ الْوَهَّابِ، قَالَ سَمِعْتُ يَحْيَى بْنَ سَعِيدٍ، قَالَ أَخْبَرَنِي سَعْدُ بْنُ إِبْرَاهِيمَ، أَنَّ نَافِعَ بْنَ جُبَيْرِ بْنِ مُطْعِمٍ، أَخْبَرَهُ أَنَّهُ، سَمِعَ عُرْوَةَ بْنَ الْمُغِيرَةِ بْنِ شُعْبَةَ، يُحَدِّثُ عَنِ الْمُغِيرَةِ بْنِ شُعْبَةَ، أَنَّهُ كَانَ مَعَ رَسُولِ اللَّهِ صلى الله عليه وسلم فِي سَفَرٍ، وَأَنَّهُ ذَهَبَ لِحَاجَةٍ لَهُ، وَأَنَّ مُغِيرَةَ جَعَلَ يَصُبُّ الْمَاءَ عَلَيْهِ، وَهُوَ يَتَوَضَّأُ، فَغَسَلَ وَجْهَهُ وَيَدَيْهِ وَمَسَحَ بِرَأْسِهِ وَمَسَحَ عَلَى الْخُفَّيْنِ‏.‏