أَفَلَا يَتَدَبَّرُونَ الْقُرْآنَ أَمْ عَلَى قُلُوبٍ أَقْفَالُهَا
[47:24]
Do they not then reflect on the Quran? Nay, on the hearts there are locks.
Do they not then earnestly seek to understand the Qur'an, or are their hearts locked up by them?
Will they then not meditate on the Qur'an, or are there locks on the hearts?