Verse 9 of Chapter 34:

Nay, but those only, who do not believe in the Hereafter, will incur the punishment and they are involved in gross error. Have they never seen the earth, which surrounds them from front and from behind? If We will, We can sink them underground, or cause some fragments of the sky to fall down upon them. There is' indeed a Sign in this for every such servant who turns to God.