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

Have they not looked at the heaven above them - how We structured it and adorned it and [how] it has no rifts?