Sunan Ibn Majah, Chapter: The Chapters on Tribulations

that the Messenger of Allah (saw) said: that the Messenger of Allah (saw) said:"There will come to the people years of treachery, when the liar will be regarded as honest, and the honest man will be regarded as a liar; the traitor will be regarded as faithful, and the faithful man will be regarded as a traitor; and the Ruwaibidah will decide matters.' It was said: 'Who are the Ruwaibidah?' He said: 'Vile and base men who control the affairs of the people.'"