Surah Al-Ma'idah Verse 79

كَانُوا لَا يَتَنَاهَوْنَ عَنْ مُنْكَرٍ فَعَلُوهُ ۚ لَبِئْسَ مَا كَانُوا يَفْعَلُونَ

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