Dr. Mustafa Khattab, the Clear Quran - Surah Al-Qamar, ayah 21

Translation of Surah Al-Qamar, ayah 21 (54:21)

فَكَيۡفَ كَانَ عَذَابِي وَنُذُرِ ٢١
Then how ˹dreadful˺ were My punishment and warnings!