Dr. Mustafa Khattab, the Clear Quran - Surah Muhammad, ayah 24

Translation of Surah Muhammad, ayah 24 (47:24)

أَفَلَا يَتَدَبَّرُونَ ٱلۡقُرۡءَانَ أَمۡ عَلَىٰ قُلُوبٍ أَقۡفَالُهَآ ٢٤
Do they not then reflect on the Quran? Or are there locks upon their hearts?