‏الجهاد والسير‏ : Hadeeth No:4308 Anas reported Allaah's Messenger (sallAllaahu alayhi wa sallam) having said this: There would be a flag for every perfidious person on the Day of Judgment by which he will be recognised....

‏البيوع : Hadeeth No:3713 A hadith like this has been narrated on the authority of Jabir (Allaah be pleased with him) from Allaah's Prophet (sallAllaahu alayhi wa sallam). but he made no mention of transactions years (ahead) implying Mu'awama....