Quran Ayats spreading rumour false accusation talk lies Islamic commands

Avoiding the irrelevant

Verses of Holy Quran
Allah Subhanahu wa Ta'ala said to His Prophet Sallallahu 'alaihi wasallam:
And say to My slaves (believers) that they should (only) say those words that are the best (in which no one's heart is hurt). Because Shaitan, verily, provokes discord among them. Surely, Shaitan is to man an open enemy. [Al-Isra 17: 53]

While mentioning the qualities of believers Allah Subhanahu wa Ta'ala says:
And those who turn away from un profitable and shameful talk and actions. [Al-Mu'minun 23: 3]

Allah Subhanahu wa Ta'ala says: (A great Punishment would have touched you for that which you had spoken):
When you were spreading it with your tongues, and saying with your mouths that of which you had no knowledge; and you considered that to be insignificant, while with Allah it was something very great.
And why did you not, when you heard it, say: It is not right for us to speak of this. Glory is to You (O Allah), this is a great false accusation.
Allah advises you not to repeat this ever again, if you are believers. [An-Nur 24: 15-17]
Note: These verses refer to an incident, when the hypocrites falsely propagated a slander against 'A'ishah Radiyallahu 'anha, at which some simple Muslims innocently began to spread the rumour.

Allah Subhanahu wa Ta'ala while mentioning qualities of believers, says:
And those who do not participate in false works (neither lie, nor give false witness, nor attend meetings of wrong affairs and sins). And when they pass by playful meetings they pass honourably [Al-Furqan 25: 72]
Note: They neither join others in sins, nor pay heed to playful meetings which go beyond the forbidden limits and nor get unnecessarily involved with them.

Allah Subhanahu wa Ta'ala says:
And when they hear unprofitable and shameful talk, they withdraw from it. [Al-Qasas 28:55]

Allah Subhanahu wa Ta'ala says:
O you who believe! If an evil doer brings you a piece of news, then make a strict enquiry lest(believing in his words) you harm people in ignorance and afterwards become regretful of what you have done. [Al-Hujurat 49: 6]

Allah Subhanahu wa Ta'ala says:
Not a word is uttered by him (man) except that there is an observer (angel) ready (to note down whatever he says). [Qaf 50: 18]