He prayed Subh and recited Ar-Rum, but he stumbled in his recitation. When he had finished praying he said: 'What is the matter with people who pray with us without purifying themselves properly? Those people make us stumble in reciting Quran.'"  

عَنْ رَجُلٍ مِنْ أَصْحَابِ النَّبِيِّ ﷺ عَنِ النَّبِيِّ ﷺ أَنَّهُ صَلَّى صَلاَةَ الصُّبْحِ فَقَرَأَ الرُّومَ فَالْتَبَسَ عَلَيْهِ فَلَمَّا صَلَّى قَالَ مَا بَالُ أَقْوَامٍ يُصَلُّونَ مَعَنَا لاَ يُحْسِنُونَ الطُّهُورَ فَإِنَّمَا يَلْبِسُ عَلَيْنَا الْقُرْآنَ أُولَئِكَ