Obscenity: The Prophet (SAWS) said: “Allah hates obscenity.” (Reported by Abu-Dawud).
The Messenger of Allah (SAWS) said: “A believing person is not that one accustomed to slander, calling curses down, or using obscene language or indecent manners.” (Reported by at-Tirmidhiyy)
The Messenger of Allah (SAWS) said: “When two persons abuse each other, the first one will be the sinner as long as the oppressed does not exceed the limits.” (Reported by Muslim)
The Messenger of Allah (SAWS) said: “Abusing a Muslim is an act of wickedness, and fighting against him is an act of disbelief.” (Reported by al-Bukhariyy and Muslim)
The Messenger of Allah (SAWS) said: “And if a man abuses and shames you for something which he finds in you, then do not shame him for something which you find in him; he will bear the evil consequences for it.” (Reported by Abu-Dawud)
This means: “So woe unto those performers of Salah (prayers) (hypocrites), Who delay their Salah (prayer) from their stated fixed times, Those who do good deeds only to be seen (of men), And refuse (to give) Al-Ma'un (small kindnesses e.g. salt, sugar, water, etc.).” (Al-Ma`un: 4 - 7)
The Prophet (SAWS) said: “If anyone wants to have his deeds widely publicized, Allah will publicize (his humiliation). And if anyone makes a hypocritical display (of his deeds), Allah will make a display of him.” (Reported by al-Bukhariyy and Muslim)
The Prophet (SAWS) said, "Indeed what I fear most for you is the lesser shirk (polytheism)." They said, "What is the lesser shirk O Messenger of Allah?" He (SAWS) said, "Ar-riya' (to show off)!
Allah (Glorified and Supreme be He) would say to them on the Day of Resurrection, when people are rewarded (or punished) for their deeds, 'Go to those to whom you used to show off in the worldly life and see if you can find any reward from them.‘” (Reported by Ahmad).
This means: “And obey not everyone who swears much, and is considered worthless, A slanderer, going about with calumnies, Hinderer of the good, transgressor, sinful, Cruel, after all that base-born (of illegitimate birth).” (Al-Qalam: 10 - 13)
The Messenger of Allah (SAWS) said: “A talebearer will not enter Paradise (unless he is punished for his evil deeds).” (Reported by Muslim)
The Prophet (SAWS) said, "Shall I tell you about the most evil amongst you? (They are those) who ever- walk about with talebearing (to cause dissension), who (accordingly) spoil (the relation) between the lovers, and who seek to distress the innocent." (Reported by Ahmad)
This means: “As for 'Ad, they were arrogant in the land without right, and they said: ''Who is mightier than us in strength?'' See they not that Allah, Who created them was mightier in strength than them.” (Fussilat: 15)
This means: “And We did not send a warner to a township, but those who were given the worldly wealth and luxuries among them said: "We believe not in the (Message) with which you have been sent. And they say: "We are more in wealth and in children, and we are not going to be punished.''” (Saba’: 34 - 35)
This means: “Is he, then, to whom the evil of his deeds made fairseeming, so that he considers it as good (equal to one who is rightly guided)? Verily, Allah sends astray whom He wills, and guides whom He wills.” (Fatir: 8)
This means: “You who believe! Do not render in vain your Sadaqah (charity) by reminders of your generosity or by injury.” (Al-Baqarah: 264)
The Prophet (SAWS) said: “But when you see niggardliness being obeyed, passion being followed, worldly interests being preferred, everyone being charmed with his own opinion, then care for yourself.” (Reported by at-Tirmidhiyy)