Jami` at-Tirmidhi 1725
جامع الترمذي#1725SahihNarrated 'Ali: "The Messenger of Allah (ﷺ) prohibited wearing Al-Qassi and what was dyed with 'Usfur." [Abu 'Eisa said:] There are narrations on this topic from Anas and 'Abdullah bin 'Amr
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 Muslim
In-book reference: 24:6