صَحِيحُ مُسْلِمٍ
Sahih Muslim 274g
The Book of Purification
Wiping over the khuff (leather socks)
وَحَدَّثَنِي مُحَمَّدُ بْنُ حَاتِمٍ، حَدَّثَنَا إِسْحَاقُ بْنُ مَنْصُورٍ، حَدَّثَنَا عُمَرُ بْنُ أَبِي زَائِدَةَ، عَنِ الشَّعْبِيِّ، عَنْ عُرْوَةَ بْنِ الْمُغِيرَةِ، عَنْ أَبِيهِ، أَنَّهُ وَضَّأَ النَّبِيَّ صلى الله عليه وسلم فَتَوَضَّأَ وَمَسَحَ عَلَى خُفَّيْهِ فَقَالَ لَهُ فَقَالَ إِنِّي أَدْخَلْتُهُمَا طَاهِرَتَيْنِ .
'Urwah al Mughira reported it from his father: He (Mughira) helped the Messenger (ﷺ) in performing the ablution, and he performed it and wiped over his shoes. He (Mughira) said to him (about the washing of the feet after putting them off), but he (the Prophet) said: I put them (feet) in when these were clean.
Sahih Muslim, 274gSahihصحيح