حَتَّىٰ إِذَا فَتَحْنَا عَلَيْهِم بَابًا ذَا عَذَابٍ شَدِيدٍ إِذَا هُمْ فِيهِ مُبْلِسُونَ (77)
(23:77) However, when We will smite them with a dreadful scourge, you will see that they will despair of all good and become desperate. *73
*73) The Arabic word mublis is used for one whom frustration makes so desperate and obdurate that he dces not hesitate to resort to any crime. The Devil has been called Iblis for the same reason.