Surah Al-Qamar — Ayah 21 (54:21)
فَكَيۡفَ كَانَ عَذَابِي وَنُذُرِ ٢١
English translation (Saheeh International)
And how [severe] were My punishment and warning.
Brief commentary
So reflect- O people of Makkah - how was my punishment to them? And how was my warning to others about their punishment?