﴿ قَدْ خَسِرَ ٱلَّذِينَ كَذَّبُوا۟ بِلِقَآءِ ٱللَّهِ ۖ حَتَّىٰٓ إِذَا جَآءَتْهُمُ ٱلسَّاعَةُ بَغْتَةًۭ قَالُوا۟ يَٰحَسْرَتَنَا عَلَىٰ مَا فَرَّطْنَا فِيهَا وَهُمْ يَحْمِلُونَ أَوْزَارَهُمْ عَلَىٰ ظُهُورِهِمْ ۚ أَلَا سَآءَ مَا يَزِرُونَ ﴾

“Lost indeed are they who consider it a lie that they will have to meet God -till the Last Hour suddenly comes upon them, [and] they cry, "Alas for us, that we disregarded it!" - for they shall bear on their backs the burden of their sins: oh, how evil the load with which they shall be burdened!”

Please check ayah 6:32 for complete tafsir.