وَّجَعَلۡنَا عَلٰي قُلُوۡبِهِمۡ اَكِنَّةً اَنۡ يَّفۡقَهُوۡهُ وَفِيۡ٘ اٰذَانِهِمۡ وَقۡرًاؕ وَاِذَا ذَكَرۡتَ رَبَّكَ فِي الۡقُرۡاٰنِ وَحۡدَهٗ وَلَّوۡا عَلٰ٘ي اَدۡبَارِهِمۡ نُفُوۡرًا

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'an, they turn back in aversion