Tafsir of Al-Inshiqaq 84:21

What is the matter with them, that they believe not? And when the Qur'an is recited to them, they fall not prostrate. meaning, what prevents them from believing in Allah, His Messenger and the Last Day, and what is wrong with them that when Allah's Ayat and His Words are recited to them they do not prostrate due to awe, respect and reverence. Concerning Allah's statement,

بل الذين كفروا يكذبون