﴿ وَذَٰلِكُمْ ظَنُّكُمُ ٱلَّذِى ظَنَنتُم بِرَبِّكُمْ أَرْدَىٰكُمْ فَأَصْبَحْتُم مِّنَ ٱلْخَٰسِرِينَ ﴾

“and that very thought which you thought about your Sustainer has brought you to perdition, and so now you find yourselves among the lost!””

Please check ayah 41:24 for complete tafsir.