Surah Al-Hujraat Verse 6 - English Translation by Dr Munir Munshey
Surah Al-Hujraatيَـٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوٓاْ إِن جَآءَكُمۡ فَاسِقُۢ بِنَبَإٖ فَتَبَيَّنُوٓاْ أَن تُصِيبُواْ قَوۡمَۢا بِجَهَٰلَةٖ فَتُصۡبِحُواْ عَلَىٰ مَا فَعَلۡتُمۡ نَٰدِمِينَ
Oh those of you who believe, if someone wicked brings you a report, investigate (and ascertain the facts). Else, you might attack a people out of ignorance, and later get to regret your actions