Qur'an, At-Tur, Surah 52:35-44
Did my critics create themselves out of nothing? Did they create the heavens and the earth? Their ideas are foolish. Do they possess and control the treasures of you Lord? Do they have a ladder by which they climb up to God, and overhear him? Let their eavesdroppers bring proof that they have heard him. Do they know the mysteries of existence, and can they write them down? ...Do they have another god besides God? Let God be exalted above their idols. If they saw part of the heavens fall from the sky, they would still say: "It is only a mass of clouds."