Qabasحَتَّىٰٓ إِذَا فَتَحۡنَا عَلَيۡهِم بَابٗا ذَا عَذَابٖ شَدِيدٍ إِذَا هُمۡ فِيهِ مُبۡلِسُونَ ٧٧
Hattā idhā fatahnā 'alayhim bāban dhā 'adhābin shadīdin idhā hum fīhi mublisūn
Until when We have opened before them a door of severe punishment, immediately they will be therein in despair.