يَا أَيُّهَا الَّذِينَ آمَنُوا إِن جَاءَكُمْ فَاسِقٌ بِنَبَإٍ فَتَبَيَّنُوا أَنْ تُصِيبُوا قَوْمًا بِجَهَالَةٍ فَتُصْبِحُوا عَلَىٰ مَا فَعَلْتُمْ نَادِمِينَ

If anyone provides information about another which takes the form of allegations against the latter, ready acceptance of this news on simply hearing it is absolutely against the precautions imposed by the Faith. It is essential on the part of the hearer of the news to make the necessary investigation about it, and whatever opinion he forms should be after impartial inquiry and not before. It frequently happens that when information of this kind is received, there are immediate suggestions of taking punitive action. This is a case of gross irresponsibility. Nobody should form any opinion about such news before investigation; nor should others suggest direct action without a thorough probe. Those who tread the path of righteousness and guidance develop an entirely different temperament from those who do not. They are averse to levelling allegations against others. They prefer to remain silent rather than talk about a supposed misdemeanour which is as yet uninvestigated. Being of such a nature is an indication of their having been blessed with a share in God’s Graces. The Faith that has really permeated their lives now is being acknowledged in verbal form.

— Source: Tazkirul Quran (Maulana Wahiduddin Khan) via Quran.com (49:6)