‏البيوع : Hadeeth No:3904 'A'isha (Allaah be pleased with her) reported that Allaah's Messenger (sallAllaahu alayhi wa sallam) bought from a Jew grain for a specified time; and gave him iron coat-of-mail of his as a pledge....

الرقائق‏ : Hadeeth No:6608 This hadith has been transmitted on the authority of Musa b. 'Uqba but with a slight variation of wording....