وَلِلْأَرْبَعَةِ عَنْهُ إِلَّا النَّسَائِيَّ: «أَنَّ اَلنَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مَسَحَ أَعْلَى اَلْخُفِّ وَأَسْفَلَهُ» وَفِي إِسْنَادِهِ ضَعْفٌ
The Prophet (sallallahu alayhi wa sallam) wiped over the upper part of the leather socks and the under part of it.
Bulugh al-Maram 69, Book 1, The Book of Purification, Hadith 69. 1 min read