قَد خَسِرَ الَّذينَ كَذَّبوا بِلِقاءِ اللَّهِ ۖ حَتّىٰ إِذا جاءَتهُمُ السّاعَةُ بَغتَةً قالوا يا حَسرَتَنا عَلىٰ ما فَرَّطنا فيها وَهُم يَحمِلونَ أَوزارَهُم عَلىٰ ظُهورِهِم ۚ أَلا ساءَ ما يَزِرونَ

Those will have lost who deny the meeting with Allah, until when the Hour [of resurrection] comes upon them unexpectedly, they will say, "Oh, [how great is] our regret over what we neglected concerning it," while they bear their burdens on their backs. Unquestionably, evil is that which they bear.