Fussilat Ayah 12

فَقَضَـٰهُنَّ سَبْعَ سَمَـٰوَاتٍ فِى يَوْمَيْنِ وَأَوْحَىٰ فِى كُلِّ سَمَآءٍ أَمْرَهَا‌ۚ وَزَيَّنَّا ٱلسَّمَآءَ ٱلدُّنْيَا بِمَصَـٰبِيحَ وَحِفْظًا‌ۚ ذَٲلِكَ تَقْدِيرُ ٱلْعَزِيزِ ٱلْعَلِيمِ ١٢ So He formed the heaven into seven heavens in two Days, assigning to each its mandate. And We adorned the lowest heaven with ?stars like? lamps ?for beauty? and for protection. That is the design of the Almighty, All-Knowing.”