وَّجَعَلْنَا عَلٰي قُلُوْبِهِمْ اَكِنَّةً اَنْ يَّفْقَهُوْهُ وَفِيْٓ اٰذَانِهِمْ وَقْرًاؕ وَاِذَا ذَكَرْتَ رَبَّكَ فِي الْقُرْاٰنِ وَحْدَهٗ وَلَّوْا عَلٰٓي اَدْبَارِهِمْ نُفُوْرًا ٤٦
Translation
and We cast veils on their hearts, lest they should understand it, and a deafness into their ears. When you mention your Lord alone in the Quran, they turn their backs in aversion.