Hadith 3:219
Al-Mughira b. Shu'ba said, “I assisted the Prophet to perform ablution on the expedition to Tabuk, and he wiped the top and bottom of the shoe.” Abu Dawud, Tirmidhi and Ibn Majah transmitted it. Tirmidhi said, “This is a weak tradition. I asked Abu Zur'a and Muhammad, i.e. Bukhari, about this tradition and they said that it is not sound.” Abu Dawud also declared it to be weak.
وَعَنِ الْمُغِيرَةِ بْنِ شُعْبَةَ قَالَ: وَضَّأْتُ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فِي غَزْوَةِ تَبُوكَ فَمَسَحَ أَعْلَى الْخُفِّ وَأَسْفَلَهُ. رَوَاهُ أَبُو دَاوُدَ وَالتِّرْمِذِيُّ وَابْنُ مَاجَهْ وَقَالَ التِّرْمِذِيُّ هَذَا حَدِيثٌ مَعْلُولٌ وَسَأَلْتُ أَبَا زُرْعَةَ وَمُحَمَّدًا يَعْنَى الْبُخَارِيَّ عَنْ هَذَا الْحَدِيثِ فَقَالَا: لَيْسَ بِصَحِيحٍ. وَكَذَا ضعفه أَبُو دَاوُد
Original Reference: Mishkat al-Masabih 521