‏الصلاة : Hadeeth No:874 Nu'man b. Bashir reported: I heard the Messenger of Allaah (sallAllaahu alayhi wa sallam) say: Straighten your rows, or Allaah would create dissension amongst you....

‏البيوع : Hadeeth No:3708 Jabir b. 'Abdullah (Allaah be pleased with them) reported that Allaah's Messenger (sallAllaahu alayhi wa sallam) forbade the types of sales as described before....