It is narrated from Sayyiduna Abu Hurairah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Among the worst of people is the one who displays two-faced behavior; he says one thing to one group and another to another group."
Hadith Referenceالادب المفرد / كتاب / 1309
Hadith Gradingالألبانی:صحيح
Hadith Takhrij«صحيح : أخرجه البخاري ، كتاب الأحكام : 7179 ، 3494 و مسلم : 2526»
Explanation & Benefits
Shaykh Maulana Usman Muneeb
Benefits and Issues: This refers to a person who makes each party believe that he is their friend. Among two mutually opposing groups, he convinces each one that he is their well-wisher, whereas in reality, he is not a well-wisher to anyone. Such a person is extremely evil. For further details, see the benefits of Hadith: 409.
Source: Fadlullah al-Ahad: Urdu Commentary on al-Adab al-Mufrad, Page: 1309