While Allâh's Messenger (ﷺ) was carrying stones (along) with the people of Makka for (the repairing of) the Ka'ba wearing an Izâr (waist-sheet cover), his uncle Al-'Abbâs said to him, "O my nephew ! (It would be better) if you take off your Izâr 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. [1:360-O.B.]