The worthlessness of worldly deeds without faith

مَّثَلُ ٱلَّذِينَ كَفَرُوا۟ بِرَبِّهِمْ ۖ أَعْمَـٰلُهُمْ كَرَمَادٍ ٱشْتَدَّتْ بِهِ ٱلرِّيحُ فِى يَوْمٍ عَاصِفٍ ۖ لَّا يَقْدِرُونَ مِمَّا كَسَبُوا۟ عَلَىٰ شَىْءٍ ۚ ذَٰلِكَ هُوَ ٱلضَّلَـٰلُ ٱلْبَعِيدُ

The example of those who disbelieve in their Lord is [that] their deeds are like ashes which the wind blows forcefully on a stormy day; they are unable [to keep] from what they earned a [single] thing. That is what is extreme error.