Then do they not reflect upon the Qur'an, or are there locks upon [their] hearts?
The Saheeh International Quran Translation
أَفَلَا يَتَدَبَّرُونَ ٱلْقُرْءَانَ أَمْ عَلَىٰ قُلُوبٍ أَقْفَالُهَآThen do they not reflect upon the Qur'an, or are there locks upon [their] hearts?