Sunan Abi Dawud
Hadith #2817
Narrated Ibn 'Abbas:The verse: ""So eat of (meats) on which Allah's name hath been pronounced"" and the verse: ""Eat not of (meats) on which Allah's name hath not been pronounced"" were abrogated, meaning an exception was made therein by the verse: ""The food of the people of the Book is lawful unto you and yours is lawful unto them