"Adab-e-Islami" or Islamic Behavioral Etiquette
"See you not how Allâh sets forth a parable? - A goodly word as a goodly tree, whose root is firmly fixed, and its branches (reach) to the sky (i.e. very high)...... And the parable of an evil word is that of an evil tree uprooted from the surface of earth having no stability." Qur'an 14: 24, 25. Ibrahim Sura
"Repel evil with that which is best: We are Well-acquainted with the things they say."—Qur'an 23:96.
"And when they hear vain talk, they turn away therefrom and say: 'To us our deeds, and to you yours; peace be to you: we seek not the ignorant.'"—Qur'an 28:55.
"Those who spend (freely), whether in prosperity, or in adversity; who restrain anger, and pardon (all) men; for Allah loves those who do good."—Qur'an 3:134.
"When a (courteous) greeting is offered you, meet it with a greeting still more courteous, or (at least) of equal courtesy. Allah takes careful account of all things."—Qur'an 4:86.