Sunan At-Tirmidhi

Narrated Nafi':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 Qur'an was revealed in line with what 'Umar had said