Sayyiduna Iyad bin Himar (may Allah be pleased with him) said: I said: O Messenger of Allah, a man from my people insults me; is there any harm upon me if I take revenge on him? He (peace and blessings be upon him) said: "Two people who insult each other are two devils, taunting each other and lying to each other."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 15071