وَجَعَلْنَا عَلَىٰ قُلُوبِهِمْ أَكِنَّةً أَن يَفْقَهُوهُ وَفِىٓ ءَاذَانِهِمْ وَقْرًا ۚ وَإِذَا ذَكَرْتَ رَبَّكَ فِى ٱلْقُرْءَانِ وَحْدَهُۥ وَلَّوْا عَلَىٰٓ أَدْبَـٰرِهِمْ نُفُورًا

WajaAAalna AAala quloobihimakinnatan an yafqahoohu wafee athanihim waqran wa-ithathakarta rabbaka fee alqur-ani wahdahuwallaw AAala adbarihim nufoora

And We have placed over their hearts coverings, lest they understand it, and in their ears deafness. And when you mention your Lord alone in the Qur’ān, they turn back in aversion.