أَفَلَا يَتَدَبَّرُونَ ٱلْقُرْءَانَ أَمْ عَلَىٰ قُلُوبٍ أَقْفَالُهَآ

Afala yatadabbaroona alqur-anaam AAala quloobin aqfaluha

Then do they not reflect upon the Qur’ān, or are there locks upon [their] hearts?