Allah Almighty said ‘And speak with goodness [Husnan] to people’ (Quran 2/83)

Al-Layth said that it means to say good and pleasant words to others. Al-Zujaj also maintained that it is to talk to people in a nice manner and possess beauty, goodness and benevolence….Al-Mundhiri reported from Abu al-Haytham that the words ^usnan and ^asanan both imply a beautiful thing. It points to beauty in everything, whether in utterance or action, moral acts or general behaviour. The divine command is to be nice and refined not only in conversation but in general behaviour. One must interact with others cordially, piously, and with a sentiment of well-wishing, goodness and beauty. (Muhammed Tahir Al-Qadri: Fatwa on Terrorism and Suicide Bombing)