[Machine] Go to Ali, for he used to travel with the Messenger of Allah ﷺ . So I went to him and said, "We are in a cold land with abundant snow. What do you see regarding wearing two pairs of socks?" He replied, "I heard the Messenger of Allah ﷺ saying, 'For the traveler, three days and their nights, and for the resident, one day and its night, to wipe over his khuff (leather socks) when he puts them on, provided he is in a state of purity and has put them on properly.' Muhammad bin 'Abdul-Rahman bin Abi Laila singled out this narration.  

ايتِ عَلِيًّا فَإِنَّهُ قَدْ كَانَ يُسَافَرُ مَعَ رَسُولِ اللهِ ﷺ فَأَتَيْتُهُ فَقُلْتُ إِنَّا نَكُونُ فِي أَرْضٍ بَارِدَةٍ وَثُلُوجٍ كَثِيرَةٍ فَمَا تَرَى فِي الْخُفَّيْنِ قَالَ سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ لِلْمُسَافِرِ ثَلَاثَةُ أَيَّامٍ وَلَيَالِيهِنَّ وَلِلْمُقِيمِ يَوْمٌ وَلَيْلَةٌ يَمْسَحُ عَلَى خُفَّيْهِ إِذَا أَدْخَلَهُمَا وَقَدْمَاهُ طَاهِرَتَانِ تَفَرَّدَ بِهَذِهِ الرِّوَايَةِ مُحَمَّدُ بْنُ عَبْدِ الرَّحْمَنِ بْنِ أَبِي لَيْلَى