﴿ هَٰذِهِ ٱلنَّارُ ٱلَّتِى كُنتُم بِهَا تُكَذِّبُونَ ﴾

““This is the fire which you were wont to call a lie!”

يَوْمَ تَمُورُ‌ السَّمَاءُ مَوْرً‌ا (...the Day when the sky will tremble, a horrible trembling, ...52:9) The lexicographical denotation of the word mawr is violent shaking, or movement caused by unrest. This verse describes the violent movement of the heavens on the Day of Resurrection.