‏البيوع : Hadeeth No:3654 Jabir b. Abdullah (Allaah be pleased with them) is reported to have said that Allaah's Messenger (sallAllaahu alayhi wa sallam) forbade the sale of a heap of dates the weight of which is unknown in accordance with the known weight of dates....

‏البيوع : Hadeeth No:3745 Rafi (Allaah be pleased with him) reported that Zuhair b. Rafi (who was his uncle) came to me and said: Allaah's Messenger (sallAllaahu alayhi wa sallam) forbade a practice which was useful for us. I said: What is this? (I believe) that whatrver Allaah's Messenger (sallAllaahu alayhi wa sallam) says...