‏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....

‏الإيمان : Hadeeth No:139 It is reported on the authority of Abu Huraira that the Messenger of Allaah (may peace and blessings be upon him) said: A person who believes in Allaah and the Last Day never nurses a grudge against the Ansar....