Surah Al-Qamar, Verse 18
كَذَّبَتْ عَادٌۭ فَكَيْفَ كَانَ عَذَابِى وَنُذُرِ
Translation — Sahih International
'Aad denied; and how [severe] were My punishment and warning.
Source
Kur'an-ı Kerim, Kamer Suresi 54:18
https://kuran.diyanet.gov.tr/mushaf/kuran-meal-2/54-suresi-18-ayet