كَانُواْ لاَ يَتَنَاهَوْنَ عَن مُّنكَرٍ فَعَلُوهُ لَبِئْسَ مَا كَانُواْ يَفْعَلُونَ
[5:79]
They used not to forbid each other the hateful things (which) they did; certainly evil was that which they did.
Nor did they (usually) forbid one another the iniquities which they committed: evil indeed were the deeds which they did.
They restrained not one another from the wickedness they did. Verily evil was that they used to do!