Surah Al-Mu'minun — Ayah 71 (23:71)

English translation (Saheeh International)

But if the Truth [i.e., Allāh] had followed their inclinations, the heavens and the earth and whoever is in them would have been ruined. Rather, We have brought them their message,¹ but they, from their message, are turning away.

1. - Or "reminder."

Brief commentary

If Allah was to have let matters run and arrange them in accordance to their desires, the heavens, earth and all their inhabitants would fall into ruin due to their ignorance of the outcome of matters, and their inability to differentiate between good and bad plans.