فَقَضَاهُنَّ سَبْعَ سَمَاوَاتٍ فِي يَوْمَيْنِ وَأَوْحَىٰ فِي كُلِّ سَمَاءٍ أَمْرَهَا ۚ وَزَيَّنَّا السَّمَاءَ الدُّنْيَا بِمَصَابِيحَ وَحِفْظًا ۚ ذَٰلِكَ تَقْدِيرُ الْعَزِيزِ الْعَلِيمِ (12)
(41:12) Then He made them seven heavens in two days and revealed to each heaven its law. And We adorned the lower heaven with lamps, and firmly secured it. *16 All this is the firm plan of the All-Mighty, the All-Knowing.
*16) To understand these verses well, it would be useful to study the following portions of the Tafhim al-Qur'an: AI-Baqarah: 29, Ar-Ra'd: 2, AI-Hijr: 1G-18, AI-Anbiya': 30-33, Al-Hajj: 65. Al-Mu'minun: 17, Ya Sin: E.N. 37, and E.N.'s 5, G of As-Saaffat.