Jami` at-Tirmidhi 3866
جامع الترمذي#3866Da'ifNarrated Ibn 'Umar:that the Messenger of Allah (ﷺ) said: "If you see those who abuse my Companions, then say: 'May Allah's curse be upon the worst of you
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirVery Daif
Al-AlbaniVery Daif
Zubair Ali ZaiDaif
In-book reference: 49:266