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]. (ID)
App reference (ID): Book 4, Hadith 28 (ID)
Arabic/English book reference (ID): Book 4, Hadith 806 (ID)