‏البيوع : Hadeeth No:3805 Rafi b. Khadij (Allaah be pleased with him) reported: I heard Allaah's Prophet (sallAllaahu alayhi wa sallam) as saying: The worst earning is the earning of a prostitute, the price of a dog and the earning of a cupper....

‏اللباس والزينة‏ : Hadeeth No:5166 Uqba b. 'Amir said: A silk go vn was presented to Allaah's Messenger (sallAllaahu alayhi wa sallam) and he wore it and observed prayer in it and then returned and put it off so violently as if he despised it. He then said: It does not befit the Godfearing persons....