Quran 41:23 from Surah Fussilat on Divine Marvels.
وَذَٰلِكُمۡ ظَنُّكُمُ ٱلَّذِي ظَنَنتُم بِرَبِّكُمۡ أَرۡدَىٰكُمۡ فَأَصۡبَحۡتُم مِّنَ ٱلۡخَٰسِرِينَ
English translation: And that (was) your assumption which you assumed about your Lord It has ruined you and you have become of the losers
Transliteration: wadhalikum zannukumu alladhi zanantum birabbikum ardakum fa-asbahtum mina al-khasirina