Translation:

47. Say: "Think ye if the punishment of Allah comes to you whether suddenly or openly will any be destroyed except those who do wrong?"

Notes (Tafseer)

865. Suddenly=without warning. Openly=with many warnings, even to the sinners, though they heed them not. As to those who understand and read the signs of God, they could always tell that all wrong-doing must eventually have its punishment. But it will affect the wrong-doers, not the righteous. It is justice, not revenge.