Sahih Bukhari Volume 1, Book 8, Hadith 441

حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، قَالَ حَدَّثَنَا عَبْدُ الْعَزِيزِ بْنُ أَبِي حَازِمٍ، عَنْ أَبِي حَازِمٍ، عَنْ سَهْلِ بْنِ سَعْدٍ، قَالَ جَاءَ رَسُولُ اللَّهِ صلى الله عليه وسلم بَيْتَ فَاطِمَةَ، فَلَمْ يَجِدْ عَلِيًّا فِي الْبَيْتِ فَقَالَ ‏"‏ أَيْنَ ابْنُ عَمِّكِ ‏"‏‏.‏ قَالَتْ كَانَ بَيْنِي وَبَيْنَهُ شَىْءٌ، فَغَاضَبَنِي فَخَرَجَ فَلَمْ يَقِلْ عِنْدِي‏.‏ فَقَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم لإِنْسَانٍ ‏"‏ انْظُرْ أَيْنَ هُوَ ‏"‏‏.‏ فَجَاءَ فَقَالَ يَا رَسُولَ اللَّهِ، هُوَ فِي الْمَسْجِدِ رَاقِدٌ، فَجَاءَ رَسُولُ اللَّهِ صلى الله عليه وسلم وَهْوَ مُضْطَجِعٌ، قَدْ سَقَطَ رِدَاؤُهُ عَنْ شِقِّهِ، وَأَصَابَهُ تُرَابٌ، فَجَعَلَ رَسُولُ اللَّهِ صلى الله عليه وسلم يَمْسَحُهُ عَنْهُ وَيَقُولُ ‏"‏ قُمْ أَبَا تُرَابٍ، قُمْ أَبَا تُرَابٍ ‏"‏‏.‏

Narrated By Sahl bin Sa'd : Allah's Apostle went to Fatima's house but did not find 'Ali there. So he asked, "Where is your cousin?" She replied, "There was something between us and he got angry with me and went out. He did not sleep (mid-day nap) in the house." Allah's Apostle asked a person to look for him. That person came and said, "O Allah's Apostle! He (Ali) is sleeping in the mosque." Allah's Apostle went there and 'Ali was lying. His upper body cover had fallen down to one side of his body and he was covered with dust. Allah's Apostle started cleaning the dust from him saying: "Get up! O Aba Turab. Get up! O Aba Turab (literally means: O father of dust).