Arabic (Original)
حَدَّثَنَا إِبْرَاهِيمُ بْنُ أَبِي الْعَبَّاسِ حَدَّثَنَا بَقِيَّةُ حَدَّثَنَا بَحِيرُ بْنُ سَعْدٍ عَنْ خَالِدِ بْنِ مَعْدَانَ عَنْ بَعْضِ أَصْحَابِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ رَأَى رَجُلًا يُصَلِّي وَفِي ظَهْرِ قَدَمِهِ لُمْعَةٌ قَدْرُ الدِّرْهَمِ لَمْ يُصِبْهَا الْمَاءُ فَأَمَرَهُ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ أَنْ يُعِيدَ الْوُضُوءَ.
English Translation
Some of the Companions of the Prophet (peace be upon him) narrated that the Messenger of Allah (peace be upon him) saw a man praying while on the top of his foot there was a dry spot the size of a dirham that the water had not reached, so the Messenger of Allah (peace be upon him) ordered him to repeat his wudu.