Sahih al-Bukhari 206
Book 4: Ablutions (Wudu') · Narrated by `Urwa bin Al-Mughira
Arabic
حَدَّثَنَا أَبُو نُعَيْمٍ، قَالَ حَدَّثَنَا زَكَرِيَّاءُ، عَنْ عَامِرٍ، عَنْ عُرْوَةَ بْنِ الْمُغِيرَةِ، عَنْ أَبِيهِ، قَالَ كُنْتُ مَعَ النَّبِيِّ صلى الله عليه وسلم فِي سَفَرٍ، فَأَهْوَيْتُ لأَنْزِعَ خُفَّيْهِ فَقَالَ " دَعْهُمَا، فَإِنِّي أَدْخَلْتُهُمَا طَاهِرَتَيْنِ ". فَمَسَحَ عَلَيْهِمَا.
English translation
Narrated `Urwa bin Al-Mughira:My father said, "Once I was in the company of the Prophet (ﷺ) on a journey and I dashed to take off his Khuffs (socks made from thick fabric or leather). He ordered me to leave them as he had put them after performing ablution. So he passed wet hands over them
Reference: Sahih al-Bukhari 206, Book of Ablutions (Wudu'). English translation by Dr. Muhammad Muhsin Khan.