23:77
حَتَّىٰٓ إِذَا فَتَحْنَا عَلَيْهِم بَابًۭا ذَا عَذَابٍۢ شَدِيدٍ إِذَا هُمْ فِيهِ مُبْلِسُونَ
Hattaaa izaa fatahnaa 'alaihim baaban zaa 'azaabin shadeedin izaa hum feehi mublisoon
Until We open on them a gate leading to a severe Punishment: then Lo! they will be plunged in despair therein!
