alkahaf

‏الَّذِينَ ضَلَّ سَعْيُهُمْ فِي الْحَيَاةِ الدُّنْيَا وَهُمْ يَحْسَبُونَ أَنَّهُمْ يُحْسِنُونَ صُنْعًا
—  سورة الكهف ١٠٤
“And those who’s life work took them astray, thinking that they are doing good”
Alkahaf (the cave) verse 104