مسند أحمد

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.