Surah Fussilat — Ayah 23 (41:23)
وَذَٰلِكُمۡ ظَنُّكُمُ ٱلَّذِي ظَنَنتُم بِرَبِّكُمۡ أَرۡدَىٰكُمۡ فَأَصۡبَحۡتُم مِّنَ ٱلۡخَٰسِرِينَ ٢٣
English translation (Saheeh International)
And that was your assumption which you assumed about your Lord. It has brought you to ruin, and you have become among the losers."
Brief commentary
And that very evil thought you thought up concerning your Lord, destroyed you, and so because of it, you became the very ones who lost in the world and the Hereafter.