It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that while explaining the command of Allah Almighty «﴿وَلَا تَلْمِزُوا أَنْفُسَكُمْ﴾» [الحجرات: 11] , he said that it means: "Do not revile one another."

It is narrated from Abu Jirah bin Dhahhak that the verse of the Noble Qur'an «﴿وَلَا تَنَابَزُوا بِالْأَلْقَابِ﴾» [الحجرات: 11] "Do not call each other by offensive nicknames" was revealed about us, that is, the Banu Salamah. He says that the Messenger of Allah (peace be upon him) came to us, and every man among us had two names. So when the Prophet (peace be upon him) would call someone, "O so-and-so," he would say, "O Messenger of Allah! He gets angry at that name."

It is narrated from Ikrimah (may Allah have mercy on him), he says that either Sayyiduna Ibn Abbas or Sayyiduna Ibn Umar (may Allah be pleased with them) invited the other. A slave girl was serving them, so (upon her mistake) one of them said to her: "O adulteress!" The other companion said: "Stop! If she is not punished for this accusation in this world, then in the Hereafter the punishment (for this slander) will be enforced." He said: "What do you say if she really is like that?" The other companion replied: "Allah Almighty does not like foul-mouthed and obscene speakers at all." Sayyiduna Ibn Abbas (may Allah be pleased with them) said: "Allah Almighty dislikes those who use foul language and speak obscenely."

It is narrated from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him), who reports from the Prophet (peace and blessings be upon him) that he said: "A believer is not one who curses excessively, is immoral, or uses obscene language."