[Machine] Ibn Abbas said to me, "Shall I not show you the Prophet's ﷺ ablution?" So, he performed ablution once, then washed his feet while his sandals were still on. This indicates that he washed his feet with the sandals on. Allah knows best.
قَالَ لِي ابْنُ عَبَّاسٍ أَلَا أُرِيكَ وُضُوءَ رَسُولِ اللهِ ﷺ؟ فَتَوَضَّأَ مَرَّةً ثُمَّ غَسَلَ رِجْلَيْهِ وَعَلَيْهِ نَعْلُهُ فَهَذَا يَدُلُّ عَلَى أَنَّهُ غَسَلَ رِجْلَيْهِ فِي النَّعْلَيْنِ وَاللهُ أَعْلَمُ