The Messenger of Allah said: 'Woe to the heels because of Hell-fire.'" (Using translation from Ibn Mājah 451)   

قَالَ رَسُولُ اللَّهِ ﷺ «وَيْلٌ لِلْأَعْقَابِ مِنَ النَّارِ أَسْبِغُوا الْوُضُوءَ»  

[Machine] He used to pass by us while people were performing ablution from Al-Mitharah (water tank) and saying, "Perform your ablution perfectly." Abu Al-Qasim ﷺ said, "Woe to the heels from the fire." Abu Muhammad said, "This hadith of Abdullah bin Amr amazed me the most."  

كَانَ يَمُرُّ بِنَا وَالنَّاسُ يَتَوَضَّئُونَ مِنَ الْمِطْهَرَةِ وَيَقُولُ «أَسْبِغُوا الْوُضُوءَ» قَالَ أَبُو الْقَاسِمِ ﷺ «وَيْلٌ لِلْعَقِبِ مِنَ النَّارِ» قَالَ أَبُو مُحَمَّدٍ «هَذَا أَعْجَبُ إِلَيَّ مِنْ حَدِيثِ عَبْدِ اللَّهِ بْنِ عَمْرٍو»