23:77
حَتَّىٰٓ إِذَا فَتَحْنَا عَلَيْهِم بَابًا ذَا عَذَابٍ شَدِيدٍ إِذَا هُمْ فِيهِ مُبْلِسُونَ
ḥattā idhā fataḥnā ʿalayhim bāban dhā ʿadhābin shadīdin idhā hum fīhi mub'lisūna
Until when We have opened before them a door of severe punishment, immediately they will be therein in despair.
— Saheeh International
until We open a gate to severe torment for them- then they will be plunged into utter despair.
— M. A. S. Abdel Haleem
Until, when We open for them the gate of severe punishment, then lo! they will be plunged into destruction with deep regrets, sorrows and in despair.
— Muhammad Muhsin Khan & Muhammad Taqi-ud-Din al-Hilali