Musnad Abu Ya'la al-Mawsili 105:2

Al-Hasan ibn 'Arafah narrated to us, Al-Walid ibn al-Fadl al-'Anazi narrated to us, from Isma'il al-'Ijli, from Hammad ibn Abi Sulayman, from Ibrahim al-Nakha'i, from 'Alqamah ibn Qays, from 'Ammar ibn Yasir, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "O 'Ammar, Gabriel came to me just now, so I said: 'O Gabriel, tell me of the virtues of 'Umar ibn al-Khattab in the heavens.' He said: 'O Muhammad, if I were to tell you of the virtues of 'Umar for as long as Noah remained among his people—a thousand years less fifty—the virtues of 'Umar would not be exhausted, and indeed 'Umar is one of the good deeds of Abu Bakr.'"