It is narrated from Sayyiduna Ammar bin Yasir (may Allah be pleased with him) that I heard the Prophet (peace and blessings of Allah be upon him) say: "Whoever is two-faced (deceitful) in this world will have two tongues made of fire on the Day of Resurrection." Then a heavyset man passed by, and the Prophet (peace and blessings of Allah be upon him) said: "He is one of them."
Hadith Referenceالادب المفرد / كتاب / 1310
Hadith Gradingالألبانی:حسن
Hadith Takhrij«حسن : أخرجه أبوداؤد ، كتاب الأدب ، باب فى ذي الوجهين : 4873 و ابن أبى شيبة : 25463 و الدارمي : 2806 - أنظر الصحيحة : 892»