Musnad Ahmad 27:1510

Al-Fadl ibn Dukayn narrated to us, Sufyan narrated to us, from Abdullah ibn Dinar, from Ibn Umar, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Aslam, may Allah keep it safe; and Ghifar, may Allah forgive it; and Usayyah, those who disobeyed Allah and His Messenger."