Once I was traveling with the Prophet ﷺ and he said, "O Mughira! take this container of water." I took it and Messenger of Allah ﷺ went far away till he disappeared. He answered the call of nature and was wearing a Syrian cloak. He tried to take out his hands from its sleeve but it was very tight so he took out his hands from under it. I poured water and he performed ablution like that for prayers and passed his wet hands over his Khuff (socks made from thick fabric or leather) and then prayed . (Using translation from Bukhārī 363)  

كُنْتُ مَعَ النَّبِيِّ ﷺ فِي سَفَرٍ فَقَالَ «يَا مُغِيرَةُ خُذِ الْإِدَاوَةَ فَأَخَذْتُهَا فَانْطَلَقَ رَسُولُ اللهِ ﷺ حَتَّى تَوَارَى عَنِّي فَقَضَى حَاجَتَهُ وَعَلَيْهِ جُبَّةٌ شَامِيَّةٌ مِنْ صُوفٍ فَذَهَبَ يُخْرِجُ يَدَهُ مِنْ كُمِّهَا فَضَاقَتْ فَأَخْرَجَ يَدَهُ مِنْ أَسْفَلِهَا فَصَبَبْتُ عَلَيْهِ فَتَوَضَّأَ وُضُوءَهُ لِلصَّلَاةِ وَمَسَحَ عَلَى خُفَّيْهِ ثُمَّ صَلَّى»