Surah Al-Ma'idah, Verse 79

كَانُواْ لَا يَتَنَاهَوۡنَ عَن مُّنكَرٖ فَعَلُوهُۚ لَبِئۡسَ مَا كَانُواْ يَفۡعَلُونَ٧٩

kānū lā yatanāhawna ʿan munkarin faʿalūhu labi'sa mā kānū yafʿalūna

They used not to prevent one another from wrongdoing that they did. How wretched was that which they were doing.