Sayyiduna Ammar ibn Yasir (Radi Allahu Anhu) narrates that the Messenger of Allah (SallAllahu Alayhi wa Sallam) said,

يا عمار أتاني جبريل آنفاً فقلت: يا جبريل حدثني بفضائل عمر بن الخطاب في السماء فقال: يا محمد لو حدثتك بفضائل عمر منذ ما لبث نوح في قومه ألف سنة إلا خمسين عاما ما نفدت فضائل عمر

“O Ammar, Jibril came to me and I asked, “O Jibril narrate to me the virtues of Umar ibn Al-Khattab in the heavens.” He said, “O Muhammad, if I was to narrate the virtues of Umar from the time that Nuh remained with his people, nine hundred and fifty years, I would not exhaust the virtues of Umar.” 

[Musnad Abi Ya'la, Vol. 4, Page 173, Hadith 1568]