What does "seven mighty heavens" (sabʿan shidādā) mean in Surah An-Naba 78:12?

Answer

In Surah An-Naba 78:12, Allah says "and built above you seven mighty heavens" (wa-banaynā fawqakum sabʿan shidādā). The classical commentators read sabʿan as the seven heavens mentioned throughout the Qur'an, and shidādā as "strong, firm, well-secured"—a structure built soundly and held aloft without crack or flaw. Al-Ṭabarī glosses it as heavens whose make is firm and unbreached; Ibn Kathīr stresses their strength, height, and well-knit construction; al-Qurṭubī likewise calls them unbreakable in build. The verb banā ("built") frames the sky as a deliberate construction, not a random expanse. Crucially, the context is argumentative: this verse opens a list of God's favours and signs (the sun, the rain, the crops) that culminates in proof of the resurrection. The point of describing the heavens as "mighty" is that the One who could raise and secure such a vast, firm structure is certainly able to raise the dead. The seven heavens are also a recurring Qur'anic theme (e.g. 67:3, 71:15), and the commentators generally treat the number as real rather than merely rhetorical, while leaving its precise nature as part of the unseen.