Narrated Abu Hurairah (RA): Allah's Messenger ( صلی اللہ علیہ وسلم ) said: "May Allah curse the Jews! They have turned the graves of their Prophets into mosques." [Agreed upon] . Muslim added: "and Christians." Narrated 'Aishah (RA) in al-Bukhari and Muslim [that Allah's Messenger ( صلی اللہ علیہ وسلم ) said] , "When a pious person amongst them (the Jews and Christians) died they used to build a place of worship and prostration on his grave." In the same Hadith is: "Those are the worst of creatures."