Abu Musa Al-Ash'ari (May Allah be pleased with him) reported:
'Aishah (May Allah be pleased with her) showed us a sheet and a thick lower garment and said to us Messenger of Allah (ﷺ) was wearing them when he died.[Al-Bukhari and Muslim]. (ID)
Arabic/English book reference (ID): Book 1, Hadith 499 (ID)