عَنِ ابْنِ عَبَّاسٍ قَالَ: كَانَ لِنَعْلِ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قِبَالَانِ مُثَنًّى شراكهما. رَوَاهُ التِّرْمِذِيّ
Translation

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