Quran 39:54 — The Throngs (Al-Zumar)

You shall obey your Lord, and submit to Him totally, before the retribution overtakes you, then you cannot be helped.

[39:53] Proclaim: "O My servants who exceeded the limits, never despair of GOD's mercy. For GOD forgives all sins. He is the Forgiver, Most Merciful."

[39:55] And follow the best path that is pointed out for you by your Lord, before the retribution overtakes you suddenly when you least expect it.