Narrated '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." (IT)
English reference (IT): Vol. 1, Book 46, Hadith 3686 (IT)
Arabic reference (IT): Book 49, Hadith 4050 (IT)