عَنْ جَابِرِ بْنِ عَبْدِ اللَّهِ رَضِيَ اللَّهُ عَنْهُ قَالَ: رَأَى رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ قَوْمًا يَتَوَضَّأُونَ فَلَمْ يَمْسَسْ أَعْقَابَهُمُ الْمَاءُ، فَقَالَ: ((وَيْلٌ لِلْأَعْقَابِ، (وَفِي رِوَايَةٍ: لِلْعَرَاقِيبِ) مِنَ النَّارِ))
It is narrated from Sayyiduna Jabir bin Abdullah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) saw some people who had performed ablution but water had not reached their heels, so he (peace and blessings be upon him) said: "Woe to the heels from the Fire."