Messenger of Allah ﷺs 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."

أَنَّهُ سَمِعَ رَسُولَ اللَّهِ ﷺ يَقُولُ إِنْ شَرَّ النَّاسِ ذُو الْوَجْهَيْنِ الَّذِي يَأْتِي هَؤُلاَءِ بِوَجْهٍ وَهَؤُلاَءِ بِوَجْهٍ