Do Not Ridicule And Defame Others
[ALLAH’S Quran – 49:11] “O you who have believed, let not a people ridicule [another] people; perhaps they may be better than them; nor let women ridicule [other] women; perhaps they may be better than them. And do not insult one another and do not call each other by [offensive] nicknames. Wretched is the name [i.e., mention] of disobedience after [one’s] faith. And whoever does not repent – then it is those who are the wrongdoers..”
The Prophet (Peace Be Upon Him) has said:
[Bukhari, Book #73, Hadith #58] “Narrated Anas bin Malik: The Prophet was not one who would abuse (others) or say obscene words, or curse (others), and if he wanted to admonish anyone of us, he used to say: “What is wrong with him, his forehead be dusted!”
[Bukhari, Book #73, Hadith #72] “Narrated Anas: Allah’s Apostle was neither a Fahish (one who had a bad tongue) nor a Sabbaba (one who abuses others) and he used to say while admonishing somebody, “What is wrong with him? May dust be on his forehead!”
[Bukhari, Book #46, Hadith #721 ] “Narrated Al-Ma’rur bin Suwaid: I saw Abu Dhar Al-Ghifari wearing a cloak, and his slave, too, was wearing a cloak. We asked him about that (i.e. how both were wearing similar cloaks). He replied, “Once I abused a man and he complained of me to the Prophet. The Prophet asked me, ‘Did you abuse him by slighting his mother?’ He added, ‘Your slaves are your brethren upon whom Allah has given you authority. So, if one has one’s brethren under one’s control, one should feed them with the like of what one eats and clothe them with the like of what one wears. You should not overburden them with what they cannot bear, and if you do so, help them (in their hard job).”
[Sunan Abu Dawud, Book #41, Hadith #4859] “Narrated Abu Hurayrah: The Prophet (peace be upon him) said: The gravest sin is going to lengths in talking unjustly against a Muslim’s honor, and it is a major sin to abuse twice for abusing once.
[Muslim, Book #032, Hadith #6263] “Abu Huraira reported Allah’s Messenger (may peace be upon him) as saying: When two persons indulge in hurling (abuses) upon one another, it would be the first one who would be the sinner so long as the oppressed does not transgress the limits.”