Jami` at-Tirmidhi 2817
جامع الترمذي#2817SahihNarrated The freed slave of Asma:from Ibn 'Umar who said: "I heard 'Umar mentioning that the Prophet (ﷺ) said: 'Whoever wears silk in the world he shall not wear it in the Hereafter
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Bashar Awad MaaroufHasan Sahih
Zubair Ali ZaiSahih - Bukhari And Muslim
In-book reference: 43:91