(Al-Mudasir) 74 : 35
إِنَّهَا لَإِحْدَى الْكُبَرِ

Indeed it is a great one.

By swearing with the seen phenomenon such as moon, night, dawn, etc. it is warned about the unseen fire that it-the fire-is surely a horrible thing. It is told in verses 87: 9-12 that the most unlucky who abstains from the Reminder-Adhikr, will be roasted in the great fire; then he won’t die in it nor live in it.