Quran 19:39

وَأَنذِرۡهُمۡ يَوۡمَ ٱلۡحَسۡرَةِ إِذۡ قُضِىَ ٱلۡأَمۡرُ وَهُمۡ فِى غَفۡلَةٍ۬ وَهُمۡ لَا يُؤۡمِنُونَ ٣٩

Warn them about the day of remorse, when judgment will be issued. They are totally oblivious; they do not believe.