Mishkat al-Masabih 3 Purification كتاب الطهارة 217

عَنْ أَبِي بَكْرَةَ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: أَنَّهُ رَخَّصَ لِلْمُسَافِرِ ثَلَاثَةَ أَيَّامٍ وَلَيَالِيَهُنَّ وَلِلْمُقِيمِ يَوْمًا وَلَيْلَةً إِذَا تَطَهَّرَ فَلَبِسَ خُفَّيْهِ أَنْ يَمْسَحَ عَلَيْهِمَا. رَوَاهُ الْأَثْرَمُ فِي سُنَنِهِ وَابْنُ خُزَيْمَةَ وَالدَّارَقُطْنِيّ وَقَالَ الْخَطَّابِيُّ: هُوَ صَحِيحُ الْإِسْنَادِ هَكَذَا فِي الْمُنْتَقى

Abu Bakr said that the Prophet gave permission for the traveller to wipe over his shoes during three days and nights, and for one who was not travelling during a day and a night, if be had been in a state of purity when he put them on. Al-Athram transmitted it in his Sunan . Ibn Khuzaima and Daraqutni also transmitted it. Al-Khattabi said in al-Muntaqa that the isnad is sound.