It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that he said: The Messenger of Allah (peace and blessings be upon him) said: "Whoever is two-faced in this world will have two tongues of fire on the Day of Resurrection."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Imam al-Awza'i (may Allah have mercy on him) except Abbad bin Abbad (may Allah have mercy on him), and Rawwad bin al-Jarrah (may Allah have mercy on him) is alone in narrating it."