I asked ʿAʿishah about wiping over the khuff (leather slippers) and she said. Ask ‘Ali, for he knows more that than me; he used to travel with the Messenger of Allah ﷺ. So I asked ‘Ali ؓ and he said: The Messenger of Allah ﷺ said: ʿFor the traveller, three days and nights; for the one who is not travelling one day and night.ʿ A similar report was narrated from ‘Ali ؓ from The Prophet ﷺ
سَلْ عَلِيًّا فَإِنَّهُ أَعْلَمُ بِهَذَا مِنِّي كَانَ يُسَافِرُ مَعَ رَسُولِ اللهِ ﷺ قَالَ فَسَأَلْتُ عَلِيًّا فَقَالَ قَالَ رَسُولُ اللهِ ﷺ لِلْمُسَافِرِ ثَلاثَةُ أَيَّامٍ وَلَيَالِيهِنَّ وَلِلْمُقِيمِ يَوْمٌ وَلَيْلَةٌ