ʿAbdullah bin ʿUmar said: I used to sleep in the mosque of the Prophet ﷺ while I was young and unmarried.  

أَنَّهُ كَانَ يَنَامُ وَهْوَ شَابٌّ أَعْزَبُ لاَ أَهْلَ لَهُ فِي مَسْجِدِ النَّبِيِّ ﷺ  

Messenger of Allah ﷺ went to Fatima's house but did not find ʿAli 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 (midday nap) in the house." Messenger of Allah ﷺ asked a person to look for him. That person came and said, "O Messenger of Allah ﷺ! He (Ali) is sleeping in the mosque." Messenger of Allah ﷺ went there and ʿAli was lying. His upper body cover had fallen down to one side of his body and he was covered with dust. Messenger of Allah ﷺ started cleaning the dust from him saying: "Get up! O Aba Turab. Get up! O Aba Turab (literally means: O father of dust).  

جَاءَ رَسُولُ اللَّهِ ﷺ بَيْتَ فَاطِمَةَ فَلَمْ يَجِدْ عَلِيًّا فِي الْبَيْتِ فَقَالَ أَيْنَ ابْنُ عَمِّكِ قَالَتْ كَانَ بَيْنِي وَبَيْنَهُ شَىْءٌ فَغَاضَبَنِي فَخَرَجَ فَلَمْ يَقِلْ عِنْدِي فَقَالَ رَسُولُ اللَّهِ ﷺ لإِنْسَانٍ انْظُرْ أَيْنَ هُوَ فَجَاءَ فَقَالَ يَا رَسُولَ اللَّهِ هُوَ فِي الْمَسْجِدِ رَاقِدٌ فَجَاءَ رَسُولُ اللَّهِ ﷺ وَهْوَ مُضْطَجِعٌ قَدْ سَقَطَ رِدَاؤُهُ عَنْ شِقِّهِ وَأَصَابَهُ تُرَابٌ فَجَعَلَ رَسُولُ اللَّهِ ﷺ يَمْسَحُهُ عَنْهُ وَيَقُولُ قُمْ أَبَا تُرَابٍ قُمْ أَبَا تُرَابٍ  

I saw seventy of As-Suffa men and none of them had a Rida' (a garment covering the upper part of the body). They had either Izars (only) or sheets which they tied round their necks. Some of these sheets reached the middle of their legs and some reached their heels and they used to gather them with their hands lest their private parts should become naked.  

رَأَيْتُ سَبْعِينَ مِنْ أَصْحَابِ الصُّفَّةِ مَا مِنْهُمْ رَجُلٌ عَلَيْهِ رِدَاءٌ إِمَّا إِزَارٌ وَإِمَّا كِسَاءٌ قَدْ رَبَطُوا فِي أَعْنَاقِهِمْ فَمِنْهَا مَا يَبْلُغُ نِصْفَ السَّاقَيْنِ وَمِنْهَا مَا يَبْلُغُ الْكَعْبَيْنِ فَيَجْمَعُهُ بِيَدِهِ كَرَاهِيَةَ أَنْ تُرَى عَوْرَتُهُ