"I asked Safwan bin 'Assal about wiping over the Khuffs, and he said: 'The Messenger of Allah ﷺ used to tell us, when we were travelling, to wipe over our Khuffs and not take them off for three nights in the event of defecating, urinating or sleeping; only in the case of Janabah.'" (Using translation from Nasāʾī 127)
«كَانَ رَسُولُ اللهِ ﷺ» يَأْمُرُنَا إِذَا كُنَّا مُسَافِرِينَ أَنْ نَمْسَحَ عَلَى خِفَافِنَا وَلَا نَنْزِعُهَا ثَلَاثَةَ أَيَّامٍ مِنْ غَائِطٍ وَبَوْلٍ وَنَوْمٍ إِلَّا مِنْ جَنَابَةٍ اللَّفْظُ لِأَحْمَدَ