Sahih Bukhari
Sahih Bukhari Volume 007, Book 071, Hadith Number 663.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 71. Medicine
Narrated By Saud : The Prophet said, "If somebody takes some 'Ajwa dates every morning, he will not be effected by poison or magic on that day till night." (Another narrator said seven dates).