Al-Hujurat 49:6
يَـٰٓأَيُّهَا ٱلَّذِينَ ءَامَنُوٓا۟ إِن جَآءَكُمْ فَاسِقٌۢ بِنَبَإٍ فَتَبَيَّنُوٓا۟ أَن تُصِيبُوا۟ قَوْمًۢا بِجَهَـٰلَةٍ فَتُصْبِحُوا۟ عَلَىٰ مَا فَعَلْتُمْ نَـٰدِمِينَ
Ya ayyuha allatheena amanooin jaakum fasiqun binaba-in fatabayyanoo an tuseebooqawman bijahalatin fatusbihoo AAala mafaAAaltum nadimeen
"O you who have believed, if there comes to you a disobedient one with information, investigate, lest you harm a people out of ignorance and become, over what you have done, regretful."
Al-Hujurat 49:6, translation by Sahih International
A short reflection
O you who believe, if a transgressor comes to you with news, verify it, lest you harm a people out of ignorance and become regretful.