from Ibn 'Umar, that the Messenger of Allah (ﷺ) said: "Indeed Allah has put the truth upon the tongue and in the heart of 'Umar." He said: "And Ibn 'Umar said: 'No affair occurred among the people, except that they said something about it, and 'Umar said something about it'" or he said - "Ibn Al-Khattab" - Kharijah (one of the narrators) had a doubt about it - "except that the Quran was revealed in line with what 'Umar had said."
Jami` at-Tirmidhi Book 49, Hadith 78