Musnad Ahmad 966
It was narrated that Shuraih bin Hani’ said:
I asked `A’ishah about wiping over the khuffain (leather slippers) and she said: Ask `Ali bin Abi Talib (رضي الله عنه), for he used to travel with the Messenger of Allah (ﷺ). So I asked him and he said: For the traveller (the khuffain in may be wiped over) for three days and nights and for the one who is not travelling one day and night. Yahya said: He - meaning Shu`bah - used to attribute it to the Prophet (ﷺ), then he stopped doing that.
حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ، عَنْ شُعْبَةَ، قَالَ حَدَّثَنِي الْحَكَمُ، عَنِ الْقَاسِمِ بْنِ مُخَيْمِرَةَ، عَنْ شُرَيْحِ بْنِ هَانِئٍ، قَالَ سَأَلْتُ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا عَنْ الْمَسْحِ عَلَى الْخُفَّيْنِ قَالَتْ سَلْ عَلِيَّ بْنَ أَبِي طَالِبٍ رَضِيَ اللَّهُ عَنْهُ فَإِنَّهُ كَانَ يُسَافِرُ مَعَ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَسَأَلْتُهُ فَقَالَ لِلْمُسَافِرِ ثَلَاثَةُ أَيَّامٍ وَلَيَالِيهِنَّ وَلِلْمُقِيمِ يَوْمٌ وَلَيْلَةٌ قَالَ يَحْيَى وَكَانَ يَرْفَعُهُ يَعْنِي شُعْبَةَ ثُمَّ تَرَكَهُ‏.‏