عَنْ اَلْمُغِيرَةِ بْنِ شُعْبَةَ ‏- رضى الله عنه ‏- قَالَ: { كُنْتُ مَعَ اَلنَّبِيِّ ‏- صلى الله عليه وسلم ‏-فَتَوَضَّأَ, فَأَهْوَيْتُ لِأَنْزِعَ خُفَّيْهِ, فَقَالَ:"دَعْهُمَا, فَإِنِّي أَدْخَلْتُهُمَا طَاهِرَتَيْنِ"فَمَسَحَ عَلَيْهِمَا } مُتَّفَقٌ عَلَيْه ِ 1‏ .‏‏1 ‏- صحيح.‏ رواه البخاري (206)‏، ومسلم (274)‏ (79)‏.‏
Translation
Narrated Ubai bin ‘Imara (rad)

I asked, “O Messenger of Allah, may I wipe over the Khuffain (leather socks)?” The Prophet (ﷺ) replied, “Yes”. I asked, “For one day?” He replied, “For one day”, I again asked, “And for two days?” He replied “For two day s too”. I again asked “And for three days” He replied, “Yes, as long as you wish”. [Reported by Abu Da’ud, who said, “It is not strong”]