78:12
وَبَنَيْنَا فَوْقَكُمْ سَبْعًۭا شِدَادًۭا ١٢
Saheeh International
And constructed above you seven strong [heavens]
Tafsir of "Ibn Kathir" (English)
And We have built above you seven strong,meaning, the seven heavens in their vastness, loftiness, perfection, precision, and adornment with both stable and moving stars.Thus, Allah says,وَجَعَلْنَا سِرَاجًا وَهَّاجًا