Muwatta Malik, Book 2, Hadith 36 (In-Book) ⓘ

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, may AIIah bless him and grant him peace, on the day that Sad ibn Abi Waqqas died, and he asked for some water to do wudu. A'isha said to him, ''Abd ar-Rahman! Perform your wudu fully, for I heard the Messenger of Allah, may Allah bless him and grant him peace, say, 'Woe to the heels in the fire.' "

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 ‏" ‏ ‏.‏