Tafsir of Al-Mu'minoon 23:77

Until, when We open for them the gate of severe punishment, then lo! they will be plunged in despair. When the command of Allah reaches them and the Hour comes to them suddenly, and they are overtaken by the punishment of Allah which they were not expecting, then they will despair of any ease and goodness, and all their hopes will disappear. A reminder of the Blessings of Allah and His immense Power Allah tells: