﴿ وَجَعَلْنَا عَلَىٰ قُلُوبِهِمْ أَكِنَّةً أَن يَفْقَهُوهُ وَفِىٓ ءَاذَانِهِمْ وَقْرًۭا ۚ وَإِذَا ذَكَرْتَ رَبَّكَ فِى ٱلْقُرْءَانِ وَحْدَهُۥ وَلَّوْا۟ عَلَىٰٓ أَدْبَٰرِهِمْ نُفُورًۭا ﴾

“for, over their hearts We have laid veils which prevent them from grasping its purport, and into their ears, deafness. And so, whenever thou dost mention, while reciting the Qur'an, thy Sustainer as the one and only Divine Being, they turn their backs [upon thee] in aversion.”

(And We place upon their hearts veils) coverings (lest they should understand it) such that they do not understand the Truth, (and in their ears a deafness; and when thou makest mention of thy Lord alone in the Qur'an) saying: there is no god but Allah, (they turn their backs) they return to their idols and resume the worship of their deities (in aversion) of what you say.