Musnad Ahmad 27:201

Yahya narrated to us, from Ubaydullah, from Nafi’, from Ibn Umar, from the Prophet (peace and blessings of Allah be upon him), who said: "For the treacherous person, a banner will be raised for him on the Day of Resurrection. It will be said: 'This is the treachery of so-and-so, son of so-and-so.'"