Al-Mughira bin Shuʿba, said, "The Prophet ﷺ went out to answer the call of nature and (when he had finished) I got up to pour water for him." I think that he said that the event had taken place during the Ghazwa of Tabuk. Al-Mughira added. "The Prophet ﷺ washed his face, and when he wanted to wash his forearms, the sleeves of his cloak became tight over them, so he took them out from underneath the cloak and then he washed them (i.e. his forearms) and passed wet hands over his Khuffs (socks made from thick fabric or leather)."  

ذَهَبَ النَّبِيُّ ﷺ لِبَعْضِ حَاجَتِهِ فَقُمْتُ أَسْكُبُ عَلَيْهِ الْمَاءَ لاَ أَعْلَمُهُ إِلاَّ قَالَ فِي غَزْوَةِ تَبُوكَ فَغَسَلَ وَجْهَهُ وَذَهَبَ يَغْسِلُ ذِرَاعَيْهِ فَضَاقَ عَلَيْهِ كُمُّ الْجُبَّةِ فَأَخْرَجَهُمَا مِنْ تَحْتِ جُبَّتِهِ فَغَسَلَهُمَا ثُمَّ مَسَحَ عَلَى خُفَّيْهِ  

The Messenger of Allah ﷺ went out for relieving himself. When he came back I brought for him a jar (of water) and poured water upon his hands and He washed his face. He tried to wash his forearms, but as the (sleeves of the) gown were tight. He, therefore, brought them out from under the gown. He then washed them, wiped his head, and wiped his socks and then prayed.  

خَرَجَ رَسُولُ اللَّهِ ﷺ لِيَقْضِيَ حَاجَتَهُ فَلَمَّا رَجَعَ تَلَقَّيْتُهُ بِالإِدَاوَةِ فَصَبَبْتُ عَلَيْهِ فَغَسَلَ يَدَيْهِ ثُمَّ غَسَلَ وَجْهَهُ ثُمَّ ذَهَبَ لِيَغْسِلَ ذِرَاعَيْهِ فَضَاقَتِ الْجُبَّةُ فَأَخْرَجَهُمَا مِنْ تَحْتِ الْجُبَّةِ فَغَسَلَهُمَا وَمَسَحَ رَأْسَهُ وَمَسَحَ عَلَى خُفَّيْهِ ثُمَّ صَلَّى بِنَا  

"The Prophet ﷺ went out to relieve himself, and when he came back, I met him with a vessel (of water). I poured some for him and he washed his hands, then he washed his face. Then he wanted to wash his forearms but his Jubbah was too tight, so he brought them out from beneath the Jubbah to wash them, and he wiped over his Khuffs, then he led us in prayer."  

خَرَجَ النَّبِيُّ ﷺ لِحَاجَتِهِ فَلَمَّا رَجَعَ تَلَقَّيْتُهُ بِإِدَاوَةٍ فَصَبَبْتُ عَلَيْهِ فَغَسَلَ يَدَيْهِ ثُمَّ غَسَلَ وَجْهَهُ ثُمَّ ذَهَبَ لِيَغْسِلَ ذِرَاعَيْهِ فَضَاقَتْ بِهِ الْجُبَّةُ فَأَخْرَجَهُمَا مِنْ أَسْفَلِ الْجُبَّةِ فَغَسَلَهُمَا وَمَسَحَ عَلَى خُفَّيْهِ ثُمَّ صَلَّى بِنَا  

"The Prophet went out to relieve himself and when he came back, I met him with a water skin and poured water for him. He washed his hands and his face, then he went to wash his forearms but his garment was too tight, so he brought his arms out from underneath his garment and washed them, then he wiped over his leather socks, then he led us in prayer."  

خَرَجَ النَّبِيُّ ﷺ لِبَعْضِ حَاجَتِهِ فَلَمَّا رَجَعَ تَلَقَّيْتُهُ بِالإِدَاوَةِ فَصَبَبْتُ عَلَيْهِ فَغَسَلَ يَدَيْهِ ثُمَّ غَسَلَ وَجْهَهُ ثُمَّ ذَهَبَ يَغْسِلُ ذِرَاعَيْهِ فَضَاقَتِ الْجُبَّةُ فَأَخْرَجَهُمَا مِنْ تَحْتِ الْجُبَّةِ فَغَسَلَهُمَا وَمَسَحَ عَلَى خُفَّيْهِ ثُمَّ صَلَّى بِنَا  

[Machine] He poured water onto the Messenger of Allah's face then went to wash his arms. The sleeves of his garment became too tight on his arms, so he took them out from under the cloak and they were made of wool. He washed them and wiped over his sandals.  

أَنَّهُ سَكَبَ عَلَى رَسُولِ اللهِ ﷺ مِنْ إِنَائِهِ «فَغَسَلَ وَجْهَهُ ثُمَّ ذَهَبَ يَغْسِلُ ذِرَاعَيْهِ فَضَاقَ كُمَّاهُ عَنْ ذِرَاعَيْهِ فَأَخْرَجَهُمَا مِنْ تَحْتِ الْجُبَّةِ وَكَانَتْ مِنْ صُوفٍ ثُمَّ» غَسَلَهُمَا وَمَسَحَ عَلَى خُفَّيْهِ  

[Machine] I was with the Messenger of Allah ﷺ on a journey, he said, "Stay behind, O Mugheerah, and go ahead, O people." He then left and fulfilled his needs, and I came to him with water for him to perform ablution. When he finished, I poured some of it on his hand and he washed his face. Then he took out his hands from his sleeve which were covered with a Roman cloak, and he found that they were tight. He took out his hands from under the cloak and washed them. Then he wiped over his socks and prayed.  

كُنْتُ مَعَ رَسُولِ اللهِ ﷺ فِي سَفَرٍ فَقَالَ «تَخَلَّفْ يَا مُغِيرَةُ وَامْضُوا أَيُّهَا النَّاسُ» قَالَ ثُمَّ ذَهَبَ فَقَضَى حَاجَتَهُ وَأَتَيْتُهُ بِإِدَاوَةٍ مِنْ مَاءٍ فَلَمَّا فَرَغَ سَكَبْتُ عَلَيْهِ مِنْهَا فَغَسَلَ وَجْهَهُ ثُمَّ ذَهَبَ يُخْرِجُ يَدَيْهِ مِنْ جُبَّةٍ عَلَيْهِ رُومِيَّةٍ فَضَاقَ كُمَّا الْجُبَّةِ فَأَخْرَجَ يَدَيْهِ مِنْ تَحْتِ الْجُبَّةِ فَغَسَلَهُمَا ثُمَّ مَسَحَ عَلَى خُفَّيْهِ ثُمَّ صَلَّى