5:79
كَانُوا۟ لَا يَتَنَاهَوْنَ عَن مُّنكَرٍ فَعَلُوهُ ۚ لَبِئْسَ مَا كَانُوا۟ يَفْعَلُونَ
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.
— Saheeh International
they did not forbid each other to do wrong. How vile their deeds were!
— M. A. S. Abdel Haleem
They used not to forbid one another from Al-Munkar (wrong, evil-doing, sins, polytheism, disbelief) which they committed. Vile indeed was what they used to do.
— Muhammad Muhsin Khan & Muhammad Taqi-ud-Din al-Hilali