"Do they not see the birds controlled in the atmosphere of the sky?" meaning the middle of the sky. "None holds them [up]"
﴿أَلَمْ يَرَوْا إِلَى الطَّيْرِ مُسَخَّرَاتٍ فِي جو السَّمَاء﴾ كَبَدِ السَّمَاءِ (مَا يُمْسِكُهُنَّ