وَأَنذِرْهُمْ يَوْمَ الْحَسْرَةِ إِذْ قُضِيَ الْأَمْرُ وَهُمْ فِي غَفْلَةٍ وَهُمْ لَا يُؤْمِنُونَ (39)
(19:39) (O Muhammad), now that these people are not paying heed and are not believing, warn them of the horrors of the Day, when judgment shall be passed, and they will have nothing left for them but vain regret.