34:2He knows what penetrates into the earth, and what comes out of it, and what descends from the sky, and what ascends to it. He is the Merciful, the Forgiving.

34:9Do they not reflect upon what lies before them and behind them, of the heaven and the earth? If We will, We can make the earth cave in beneath them, or make pieces of the sky fall down on them. In that is a sign for every devout servant.