18. Al-Kahf (The Cave)

Surah: 18   Aya: 57

57. Waman athlamu mimman thukkira bi-ayati rabbihi faaAArada AAanha wanasiya ma qaddamat yadahu inna jaAAalna AAala quloobihim akinnatan an yafqahoohu wafee athanihim waqran wa-in tadAAuhum ila alhuda falan yahtadoo ithan abadan
  

  Translation

57. And who does more wrong than he who is reminded of the Ayât (proofs, evidences, verses, lessons, signs, revelations, etc.) of his Lord, but turns away from them forgetting what (deeds) his hands have sent forth. Truly, We have set veils over their hearts lest they should understand this (the Qur'ân), and in their ears, deafness. And if you (O Muhammad SAW) call them to guidance, even then they will never be guided.