Mishkat al-Masabih 22 Clothing كتاب اللباس 105

وَعَن القاسمِ بن محمَّدٍ عَنْ عَائِشَةَ قَالَتْ: رُبَّمَا مَشَى النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فِي نَعْلٍ وَاحِدَةٍ وَفِي رِوَايَةٍ: أَنَّهَا مَشَتْ بِنَعْلٍ وَاحِدَةٍ. رَوَاهُ التِّرْمِذِيُّ وَقَالَ: هَذَا أصحُّ

Al-Qasim b. Muhammad quoted ‘A’isha as saying the Prophet often walked wearing one sandal. A version says she walked wearing one sandal. Tirmidhi transmitted it, saying this is sounder