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  

[Machine] "That the Messenger of Allah ﷺ used to wipe over his mawqayn and khimar."  

أَنَّ رَسُولَ اللهِ ﷺ كَانَ يَمْسَحُ عَلَى الْمُوقَيْنِ وَالْخِمَارِ