47:24
أَفَلَا يَتَدَبَّرُونَ ٱلْقُرْءَانَ أَمْ عَلَىٰ قُلُوبٍ أَقْفَالُهَآ
afalā yatadabbarūna l-qur'āna am ʿalā qulūbin aqfāluhā
Will they not contemplate the Quran? Do they have locks on their hearts?
Do they not then think deeply in the Qur’ân, or are their hearts locked up (from understanding it)?