أَفَلَم يَنظُروا إِلَى السَّماءِ فَوقَهُم كَيفَ بَنَيناها وَزَيَّنّاها وَما لَها مِن فُروجٍ

Didn’t they observe the sky above them—how We constructed it, decorated it, and it has no cracks?