Respect and honour all human beings irrespective of their religion, colour, race, sex, language, status, property, birth, profession/job and so on
[al-Isra' 17:70]
2. Talk straight, to the point, without any ambiguity or deception
[al-Ahzab 33:70]
3. Choose best words to speak and say them in the best possible way
[al-Baqarah 2:83]
4. Do not shout. Speak politely keeping your voice low.
[Luqman 31:19]
5. Always speak the truth. Shun words that are deceitful and ostentatious
[al-Hajj 22:30]
6. Do not confound truth with falsehood
[al-Baqarah 2:42]
7. Say with your mouth what is in your heart
[al-E Imram 3:167]
8. Speak in a civilised manner in a language that is recognised by the society and is commonly used
[An Nisa 4:5]
9. When you voice an opinion, be just, even if it is against a relative
[al-An'am 6:152]
10. Do not be a bragging boaster
[Luqman 31:18]
11. Do not talk, listen or do anything vain
[al-Mu'mineen 23:3, al-Qasas 28:55]
12. Do not participate in any paltry. If you pass near a futile play, then pass by with dignity
[al-Furqan 25:72]
13. Do not verge upon any immodesty or lewdness whether surreptitious or overt
[al-An'am 6:151]
14. If, unintentionally, any misconduct occurs by you, then correct yourself expeditiously
[al-E-Imram 3:134]
15. Do not be contemptuous or arrogant with people
[Luqman 31:18]
16. Do not walk haughtily or with conceit
[al-Isra' 17:37, Luqman 31:18]
17. Be moderate in thy pace
[Luqman 31:19]
18. Walk with humility and sedateness
[al-Furqan 25:63]
19. Keep your gazes lowered devoid of any lecherous leers and salacious stares
[an-Nur 24:30-31, Ghafir 40:19]
20. If you do not have complete knowledge about anything, better keep your mouth shut. You might think that speaking about something without full knowledge is a trivial matter. But it might have grave consequences
[an-Nur 24:14-16]