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.