Sahih al-Bukhari, Book 93, Hadith 42 (In-Book) ⓘ
Narrated Abu Huraira: Allah's Messengers said, "The worst of all mankind is the double-faced one, who comes to some people with one face and to others, with another face."
حَدَّثَنَا قُتَيْبَةُ، حَدَّثَنَا اللَّيْثُ، عَنْ يَزِيدَ بْنِ أَبِي حَبِيبٍ، عَنْ عِرَاكٍ، عَنْ أَبِي هُرَيْرَةَ، أَنَّهُ سَمِعَ رَسُولَ اللَّهِ صلى الله عليه وسلم يَقُولُ " إِنْ شَرَّ النَّاسِ ذُو الْوَجْهَيْنِ، الَّذِي يَأْتِي هَؤُلاَءِ بِوَجْهٍ وَهَؤُلاَءِ بِوَجْهٍ " .
also referenced under: Hadith 7179 (DarusSalam) & Volume 9, Book 89, Hadith 290 (USC-MSA)