‏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....

‏البيوع : Hadeeth No:3826 This hadith has been reported on the authority of Yahya b. Abu Kathir with the same chain of transmitters....