You will find the worst amongst the people one having double face. He comes to some people with one face and to the others with the other face.

قَالَ رَسُولُ اللَّهِ ﷺ تَجِدُونَ مِنْ شَرِّ النَّاسِ ذَا الْوَجْهَيْنِ الَّذِي يَأْتِي هَؤُلاَءِ بِوَجْهٍ وَهَؤُلاَءِ بِوَجْهٍ