‏البيوع : Hadeeth No:3878 Ibn 'Abbas; (Allaah be pleased with them) reported on the authority of Usama b. Zaid Allaah's Messenger (sallAllaahu alayhi wa sallam) as having said this: There is no element of interest when the money or commodity is exchanged hand to hand....

‏الزكاة : Hadeeth No:2191 This hadith has been narrated by Ibn 'Urwa with the same chain of transmitters....