‏البيوع : Hadeeth No:3644 Ibn 'Umar (Allaah be pleased with them) reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: He who buys foodgrain should not sell it until he has taken full possession of it....

‏البر والصلة والآداب‏ : Hadeeth No:6238 'A'isha reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: A believer does not receive (the trouble) of running a thorn or more than that but Allaah elevates him in rank or effaces his sins because of tbat....