Progressive Punishment (Ṣaʿad)

لِّنَفْتِنَهُمْ فِيهِ ۚ وَمَن يُعْرِضْ عَن ذِكْرِ رَبِّهِۦ يَسْلُكْهُ عَذَابًا صَعَدًا

So We might test them therein. And whoever turns away from the remembrance of his Lord He will put into arduous punishment.