Sahih al-Bukhari 364
Narrated Jabir bin `Abdullah:
While Allah's Messenger (ﷺ) was carrying stones (along) with the people of Mecca for (the building of) the 
Ka`ba wearing an Izar (waist-sheet cover), his uncle Al-`Abbas said to him, "O my nephew! (It would 
be better) if you take off your Izar and put it over your shoulders underneath the stones." So he took 
off his Izar and put it over his shoulders, but he fell unconscious and since then he had never been 
seen naked.
حَدَّثَنَا مَطَرُ بْنُ الْفَضْلِ، قَالَ حَدَّثَنَا رَوْحٌ، قَالَ حَدَّثَنَا زَكَرِيَّاءُ بْنُ إِسْحَاقَ، حَدَّثَنَا عَمْرُو بْنُ دِينَارٍ، قَالَ سَمِعْتُ جَابِرَ بْنَ عَبْدِ اللَّهِ، يُحَدِّثُ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ يَنْقُلُ مَعَهُمُ الْحِجَارَةَ لِلْكَعْبَةِ وَعَلَيْهِ إِزَارُهُ‏.‏ فَقَالَ لَهُ الْعَبَّاسُ عَمُّهُ يَا ابْنَ أَخِي، لَوْ حَلَلْتَ إِزَارَكَ فَجَعَلْتَ عَلَى مَنْكِبَيْكَ دُونَ الْحِجَارَةِ‏.‏ قَالَ فَحَلَّهُ فَجَعَلَهُ عَلَى مَنْكِبَيْهِ، فَسَقَطَ مَغْشِيًّا عَلَيْهِ، فَمَا رُئِيَ بَعْدَ ذَلِكَ عُرْيَانًا صلى الله عليه وسلم‏.‏