وَحَدَّثَنِي عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ أَنَّ عَبْدَ الرَّحْمَنِ بْنَ أَبِي بَكْرٍ، قَدْ دَخَلَ عَلَى عَائِشَةَ زَوْجِ النَّبِيِّ صلى الله عليه وسلم يَوْمَ مَاتَ سَعْدُ بْنُ أَبِي وَقَّاصٍ فَدَعَا بِوَضُوءٍ فَقَالَتْ لَهُ عَائِشَةُ يَا عَبْدَ الرَّحْمَنِ أَسْبِغِ الْوُضُوءَ فَإِنِّي سَمِعْتُ رَسُولَ اللَّهِ صلى الله عليه وسلم يَقُولُ " وَيْلٌ لِلأَعْقَابِ مِنَ النَّارِ " .
Yahya related to me from Malik that he had heard that Abd ar-Rahman ibn Abi Bakr was visiting A'isha, the wife of the Prophet, mayAIIah bless him and grant him peace, on the day that Sad ibn AbiWaqqas died, and he asked for some water to do wudu. A'isha said tohim, ''Abd ar-Rahman! Perform your wudu fully, for I heard theMessenger of Allah, may Allah bless him and grant him peace, say, 'Woeto the heels in the fire.' " Translation Not Available
Book Ref: Muwatta Imam Malik Book 2 Hadith 36
Web Ref: Muwatta Imam Malik Book 2 Hadith 5