Jami` at-Tirmidhi 3843
جامع الترمذي#3843Da'ifNarrated Abu Idris Al-Khawlani:"When 'Umar bin Al-Khattab removed 'Umair bin Sa'd as governor of Hims, he appointed Mu'awiyah. The people said: 'He has removed 'Umair and appointed Mu'awiyah.' So 'Umair said: 'Do not mention Mu'awiyah except with good, for indeed, I heard the Messenger of Allah (ﷺ) saying: "O Allah guide (others) by him
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih Lighairihi
Al-AlbaniSahih
Bashar Awad MaaroufDaif
Zubair Ali ZaiDaif
In-book reference: 49:243