‏البيوع : Hadeeth No:3653 Jabir b. Abdullah (Allaah be pleased with them) reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: When you purchase foodgrains, do not sell them until you have taken possession of them....

‏الزكاة : Hadeeth No:2180 Thauban reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as saying: The most excellent dinar is one that a person spends on his family, and the dinar which he spends on his animal in Allaah's path, and the dinar he spends on his companions in Allaah's path. Abu Qilaba (one of the narrators...