‏الزكاة : Hadeeth No:2339 Abu Huraira reported that Hasan b. 'Ali took one of The dates of the sadaqa and put it in his mouth, whereupon the Prophet (sallAllaahu alayhi wa sallam) said: Leave it, leave it, throw it; don't you know that we do not eat the sadaqa?...

‏البيوع : Hadeeth No:3617 Ibn 'Umar (Allaah be pleased with them) reported Allaah's Messenger (sallAllaahu alayhi wa sallam) as having said this: One amongst you should not enter into a transaction when another is bargaining....