Verses 30-33 of Chapter 21:

Have not the people, who have disbelieved (the Message), ever considered this: the heavens and the earth were at first one mass; then We parted them, and created every living thing from water? Do they not acknowledge (that this is Our Creation)? And We set mountains firmly in the earth lest it should tilt to one side along with them, and We left therein open paths so that they may find their way. And We made the sky a safe canopy, but in spite of this they do not pay due heed to its signs. And it is Allah, Who has made the night and the day and created the sun and the moon; all of them are floating, each in its own orbit.