[Machine] About the Prophet ﷺ , he saw a man performing ablution for prayer but he left a small spot of his nails untouched by water. So the Messenger of Allah ﷺ commanded him to repeat his ablution and then he said, "Woe to the heels from the Hellfire."
عَنِ النَّبِيِّ ﷺ أَنَّهُ رَأَى رَجُلًا تَوَضَّأَ لِلصَّلَاةِ وَقَدْ تَرَكَ مَوْضِعَ ظُفْرٍ مِنَ الْوُضُوءِ فَأَمَرَهُ رَسُولُ اللهِ ﷺ أَنْ يُسْبِغَ الْوُضُوءَ ثُمَّ قَالَ «وَيْلٌ لِلْعَرَاقِيبِ مِنَ النَّارِ»