Sahih al-Bukhari 203
Sahih al-Bukhari · Book 4: Ablutions (Wudu') · To pass wet hands over Khuffain [two leather socks covering the ankles]
Narrated Al-Mughira bin Shu`ba:
حَدَّثَنَا عَمْرُو بْنُ خَالِدٍ الْحَرَّانِيُّ ، قَالَ حَدَّثَنَا اللَّيْثُ ، عَنْ يَحْيَى بْنِ سَعِيدٍ ، عَنْ سَعْدِ بْنِ إِبْرَاهِيمَ ، عَنْ نَافِعِ بْنِ جُبَيْرٍ ، عَنْ عُرْوَةَ بْنِ الْمُغِيرَةِ ، عَنْ أَبِيهِ الْمُغِيرَةِ بْنِ شُعْبَةَ ، عَنْ رَسُولِ اللَّهِ صلى الله عليه وسلم أَنَّهُ خَرَجَ لِحَاجَتِهِ فَاتَّبَعَهُ الْمُغِيرَةُ بِإِدَاوَةٍ فِيهَا مَاءٌ، فَصَبَّ عَلَيْهِ حِينَ فَرَغَ مِنْ حَاجَتِهِ ، فَتَوَضَّأَ وَمَسَحَ عَلَى الْخُفَّيْنِ.
Once Allah's Messenger (ﷺ) went out to answer the call of nature and I followed him with a tumbler containing water, and when he finished, I poured water and he performed ablution and passed wet hands over his Khuffs (socks made from thick fabric or leather).