Tafseer Ibn Kathir of AZ ZUMAR [54]

وَأَنِيبُوا إِلَى رَبِّكُمْ وَأَسْلِمُوا لَهُ مِن قَبْلِ أَن يَأْتِيَكُمُ الْعَذَابُ ثُمَّ لَا تُنصَرُونَ

And return [in repentance] to your Lord and submit to Him before the punishment comes upon you; then you will not be helped.