‏الجهاد والسير‏ : Hadeeth No:4304 Ibn Umar reported that he heard the Messenger of Allaah (sallAllaahu alayhi wa sallam) saying: There will be a flag for every perfidious person on the Day of Judgment....

‏الفضائل : Hadeeth No:5683 This hadith has been narrated on the authority of Abu Sa'id Khudri through another chain of transmitters....