Surah Al-An'am Verse 131

ذَٰلِكَ أَنْ لَمْ يَكُنْ رَبُّكَ مُهْلِكَ الْقُرَىٰ بِظُلْمٍ وَأَهْلُهَا غَافِلُونَ

That is because your Lord would not destroy the cities for wrongdoing while their people were unaware