Anas (May Allah be pleased with him) reported:
Messenger of Allah (ﷺ) said, "He who wears silk clothes in this life shall not wear them in the Hereafter."[Al-Bukhari and Muslim]. (IT)
App reference (IT): Book 4, Hadith 28 (IT)
Arabic/English book reference (IT): Book 4, Hadith 806 (IT)