[Machine] The Messenger of Allah ﷺ used to relieve himself, and I would bring him water so he could perform ablution and wipe over the turban and the socks.  

كَانَ رَسُولُ اللهِ ﷺ يَقْضِي حَاجَتَهُ فَآتِيهِ بِالْمَاءِ فَيَتَوَضَّأُ وَيَمْسَحُ عَلَى الْعِمَامَةِ وَعَلَى الْخُفَّيْنِ  

[Machine] Regarding the ablution of the Prophet Muhammad ﷺ , it was reported that he used to leave to attend to his needs, then he would come back with water, perform ablution, and wipe over his turban and shoes.  

عَنْ وُضُوءِ النَّبِيِّ ﷺ فَقَالَ «كَانَ يَخْرُجُ يَقْضِي حَاجَتَهُ فَآتِيهِ بِالْمَاءِ فَيَتَوَضَّأُ وَيَمْسَحُ عَلَى عِمَامَتِهِ وَمُوقَيْهِ»  

He went out to relieve himself. Then I brought water for him and he performed ablution, and wiped over his turban and socks. (Using translation from Abū Dāʾūd 153)   

عَنْ وُضُوءِ رَسُولِ اللهِ ﷺ فَقَالَ كَانَ يَخْرُجُ يَقْضِي حَاجَتَهُ فَآتِيهِ بِالْمَاءِ فَيَتَوَضَّأُ وَيَمْسَحُ عَلَى عِمَامَتِهِ وَمُوقَيْهِ وَقَالَ غَيْرُهُ تَمِيمُ بْنُ مُرَّةَ