Surah Hud, Verse 117

وَمَا كَانَ رَبُّكَ لِيُهۡلِكَ ٱلۡقُرَىٰ بِظُلۡمٖ وَأَهۡلُهَا مُصۡلِحُونَ١١٧

wamā kāna rabbuka liyuh'lika l-qurā biẓul'min wa-ahluhā muṣ'liḥūna

And your Lord would not have destroyed the cities unjustly while their people were reformers.