Surah Al-Kahf (The Cave), Verse 104

اَلَّذِیْنَ ضَلَّ سَعْیُهُمْ فِی الْحَیٰوةِ الدُّنْیَا وَهُمْ یَحْسَبُوْنَ اَنَّهُمْ یُحْسِنُوْنَ صُنْعًا ۟

Allazeena dalla sa'yuhum fil hayaatid dunyaa wa hum yahsaboona annahum yuhsinoona sun'aa

“"Those whose efforts have been wasted in this life, while they thought that they were acquiring good by their works?"”

Quran 18:104 (Yusuf Ali Translation)