‏الصيام : Hadeeth No:2403 A hadith like this has been narrated on the authority of 'Ubaidullah on the two chains of transmitters....

‏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....