عَنِ النُّعْمَانِ بْنِ سَالِمٍ عَنْ رَجُلٍ جَدُّهُ أَوْسُ بْنُ أَبِي أَوْسٍ كَانَ يُصَلِّي وَيُوْمِئُ إِلَى نَعْلَيْهِ وَهُوَ فِي الصَّلَاةِ فَيَأْخُذُهُمَا فَيَنْتَعِلُهُمَا وَيُصَلِّي فِيهِمَا، وَيَقُولُ: كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ يُصَلِّي فِي نَعْلَيْهِ
Nu’man bin Salim narrates from a man that his grandfather Aws bin Abi Aws used to pray and during the prayer he would point towards his shoes, then pick them up and wear them while praying, and would say: The Messenger of Allah (peace and blessings be upon him) used to pray in his shoes.