From Sahih Bukhari (Hadith 5818):
Narrated Abu Burda:Aisha brought out to us a Kisa and an Izar and said, "The Prophet (ﷺ) died while wearing these two." (Kisa, a square black piece of woolen cloth. Izar, a sheet cloth garment covering the lower half of the body)
Reference: Bukhari 5818