Musnad Ahmad 27:391

Muhammad ibn Ubayd narrated to us, Ubaydullah narrated to us, from Nafi’, from Ibn Umar, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "When Allah gathers the first and the last on the Day of Resurrection, a banner will be raised for every treacherous person. It will be said: 'This is the treachery of so-and-so, son of so-and-so.'"