It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) said: "I am a guarantor of a house on the outskirts of Paradise, a house in its highest part and a house in its lowest part, for whoever gives up arguing even when he is in the right, gives up lying even in jest, and makes his character good towards people."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 11243