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.
Sahih al-Bukhari Book 8, Hadith 16
← Previous Hadith Once I was traveling with the Prophet (ﷺ) and he said, "O Mughira! take this container of water." I took it and Allah's Messenger (ﷺ) went far away till he disappeared. He answered the call of nature and was wearing a Syrian cloak. He tried to take out his hands from its sleeve but it was very tight so he took out his hands from under it. I poured water and he performed ablution like that for prayers and passed his wet hands over his Khuff (socks made from thick fabric or leather) and then prayed .

Sahih al-Bukhari Book 8, Hadith 15 Next Hadith → A man stood up and asked the Prophet (ﷺ) about praying in a single garment. The Prophet (ﷺ) said, "Has every one of you two garments?" A man put a similar question to `Umar on which he replied, "When Allah makes you wealthier then you should clothe yourself properly during prayers. Otherwise one can pray with an Izar and a Rida' (a sheet covering the upper part of the body.) Izar and a shirt, Izar and a Qaba', trousers and a Rida, trousers and a shirt or trousers and a Qaba', Tubban and a Qaba' or Tubban and a shirt." (The narrator added, "I think that he also said a Tubban and a Rida. ")

Sahih al-Bukhari Book 8, Hadith 17