‏البيوع : Hadeeth No:3660 Ibn Umar reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: There is no transaction between two persons entering a transaction until they separate, but only when there is an option to annul it....

‏البر والصلة والآداب‏ : Hadeeth No:6310 This hadith has been reported on the authority of A'mash with the same chain of transmitters and no mention is made in the hadith transmitted on the authority of 'Isa (of these words):" He who endeavours to tell the truth and endeavours to tell a lie," and in the hadith transmitted on the authority ...