Surah Fussilat, Verse 12
فَقَضَىٰهُنَّ سَبْعَ سَمَٰوَاتٍۢ فِى يَوْمَيْنِ وَأَوْحَىٰ فِى كُلِّ سَمَآءٍ أَمْرَهَا ۚ وَزَيَّنَّا ٱلسَّمَآءَ ٱلدُّنْيَا بِمَصَٰبِيحَ وَحِفْظًۭا ۚ ذَٰلِكَ تَقْدِيرُ ٱلْعَزِيزِ ٱلْعَلِيمِ
Translation — Sahih International
And He completed them as seven heavens within two days and inspired in each heaven its command. And We adorned the nearest heaven with lamps and as protection. That is the determination of the Exalted in Might, the Knowing.
Source
Kur'an-ı Kerim, Fussilet Suresi 41:12
https://kuran.diyanet.gov.tr/mushaf/kuran-meal-2/41-suresi-12-ayet