They used not to prevent one another from wrongdoing that they did. How wretched was that which they were doing.
The Saheeh International Quran Translation
كَانُوا۟ لَا يَتَنَاهَوْنَ عَن مُّنكَرٍ فَعَلُوهُ لَبِئْسَ مَا كَانُوا۟ يَفْعَلُونَThey used not to prevent one another from wrongdoing that they did. How wretched was that which they were doing.