الماۤئدة — Al-Ma'idah Ayat 79

كَانُوْا لَا يَتَنَاهَوْنَ عَنْ مُّنْكَرٍ فَعَلُوْهُۗ لَبِئْسَ مَا كَانُوْا يَفْعَلُوْنَ

Kānū lā yatanāhauna ‘am munkarin fa‘alūh(u), labi'sa mā kānū yaf‘alūn(a).

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