Malik related to me from Abu'z-Zinad from al-Araj from Abu Hurayra that the Messenger of Allah ﷺ said, "One of the most evil of people is the two-faced person who shows one face to these people and another face to those people."
أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ مِنْ شَرِّ النَّاسِ ذُو الْوَجْهَيْنِ الَّذِي يَأْتِي هَؤُلاَءِ بِوَجْهٍ وَهَؤُلاَءِ بِوَجْهٍ