‏الطهارة : Hadeeth No:543 Zahri and Ibn Musayyab have both transmitted a hadith like this from Abu Huraira who narrated it from the Prophet (sallAllaahu alayhi wa sallam)....

‏الإيمان : Hadeeth No:201 Thabit b. Dahhak reported that he pledged allegiance to the Messenger of Allaah (sallAllaahu alayhi wa sallam) under the Tree, and verily the Messenger of Allaah (sallAllaahu alayhi wa sallam) observed: He who took an oath of a religion other than Islam, in the state of being a liar, would became so...