Musnad Ahmad 1119
It was narrated from Shuraih bin Hani’ that He asked `A`ishah (رضي الله عنها) about wiping over the khuffain (leather slippers). She said:
Ask ’Ali (رضي الله عنه) about that, for he used to go out on campaign with the Messenger of Allah (ﷺ). So he asked him and he said: `For the traveller, three days and nights; for one who is not travelling, one day and night.` It was said to Muhammad: Did he attribute it to the Prophet (ﷺ)” He said: He thought that it was marfoo` [attributed to the Prophet (ﷺ)] but he was afraid to say so.
حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، حَدَّثَنَا شُعْبَةُ، عَنِ الْحَكَمِ، قَالَ سَمِعْتُ الْقَاسِمَ بْنَ مُخَيْمِرَةَ، يُحَدِّثُ عَنْ شُرَيْحِ بْنِ هَانِئٍ، أَنَّهُ سَأَلَ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا عَنْ الْمَسْحِ عَلَى الْخُفَّيْنِ فَقَالَتْ سَلْ عَنْ ذَلِكَ عَلِيًّا رَضِيَ اللَّهُ عَنْهُ فَإِنَّهُ كَانَ يَغْزُو مَعَ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَسَأَلَهُ فَقَالَ لِلْمُسَافِرِ ثَلَاثَةُ أَيَّامٍ وَلَيَالِيهِنَّ وَلِلْمُقِيمِ يَوْمٌ وَلَيْلَةٌ قِيلَ لِمُحَمَّدٍ كَانَ يَرْفَعُهُ فَقَالَ إِنَّهُ كَانَ يَرَى أَنَّهُ مَرْفُوعٌ وَلَكِنَّهُ كَانَ يَهَابُهُ‏.‏