Sahih Bukhari
Sahih Bukhari Volume 009, Book 089, Hadith Number 290.
Hadith Section/Book: Sahih Bukhari Sahih Bukhari Book 89. Judgments (Ahkaam)
Narrated By Abu Huraira : Allah's Apostles said, "The worst of all mankind is the double-faced one, who comes to some people with one countenance and to others, with another countenance."