Jami` at-Tirmidhi 3686
جامع الترمذي#3686HasanNarrated 'Uqbah bin 'Amir:that the Messenger of Allah (ﷺ) said: "If there was to have a Prophet after me, it would have been 'Umar bin Al-Khattab
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirHasan
Al-AlbaniHasan
Bashar Awad MaaroufHasan
Zubair Ali ZaiIsnaad Hasan
In-book reference: 49:82