Surah An-Naazi'aat, Verse 34
فَإِذَا جَآءَتِ ٱلطَّآمَّةُ ٱلْكُبْرَىٰ
Translation — Sahih International
But when there comes the greatest Overwhelming Calamity -
Source
Kur'an-ı Kerim, Nâzi'ât Suresi 79:34
https://kuran.diyanet.gov.tr/mushaf/kuran-meal-2/79-suresi-34-ayet