سورة Al-Kahf ( The Cave ) - الآية 57

And who does more wrong than he who is reminded of the Ayat (signs) of his Lord, but turns away from them, forgetting what his hands have sent forth. Truly, We have set over their hearts Akinnah, lest they should understand this (the Qur'an), and in their ears, deafness. And if you call them to guidance, even then they will never be guided.