(26) باب ذَمِّ ذِي الْوَجْهَيْنِ وَتَحْرِيمِ فِعْلِهِ
Abu Huraira reported Allah's Messenger (ﷺ) as saying:
The worst amongst the people is the double-faced one; he comes to some people with one face and to others with the other face.
Reference: Sahih Muslim 2526 c
In-book reference: Book 45, Hadith 127
USC-MSA web (English) reference(deprecated numbering scheme): Book 32, Hadith 6300