Musnad Ahmad 27:1593

Hujayn and Musa ibn Dawud narrated to us, they said: Abd al-Aziz ibn Abd Allah narrated to us, from Abd Allah ibn Dinar, from Ibn Umar, from the Prophet, may Allah bless him and grant him peace, who said: "Indeed, for the treacherous person there is a banner on the Day of Resurrection; it is said: 'Behold, this is the treachery of so-and-so.'"