18:104
ٱلَّذِينَ ضَلَّ سَعْيُهُمْ فِى ٱلْحَيَوٰةِ ٱلدُّنْيَا وَهُمْ يَحْسَبُونَ أَنَّهُمْ يُحْسِنُونَ صُنْعًا ١٠٤
Saheeh International
[They are] those whose effort is lost in worldly life, while they think that they are doing well in work."
18
Surah Al Kahf Ayah 104
Ayah-110, Makkah