Sayyiduna Abu Umamah al-Bahili (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) said: "Kindness (in dealing) befits only one who is of noble lineage, or religious, or forbearing."
Hadith Referenceالمعجم الكبير للطبراني / باب الصاد / 7621