﴿ وَأَنِيبُوٓا۟ إِلَىٰ رَبِّكُمْ وَأَسْلِمُوا۟ لَهُۥ مِن قَبْلِ أَن يَأْتِيَكُمُ ٱلْعَذَابُ ثُمَّ لَا تُنصَرُونَ ﴾

“Hence, turn towards your Sustainer [alone] and surrender yourselves unto Him ere the suffering [of death and resurrection] comes upon you, for then you will not be succoured.”

Please check ayah 39:59 for complete tafsir.