and whenever a surah is revealed they look at each other does anyone see you? and then they dismiss themselves. allah has dismissed their hearts because they are a people who do not understand.
وإذا ما أنزلت سورة نظر بعضهم إلى بعض هل يراكم من أحد ثم انصرفوا صرف الله قلوبهم بأنهم قوم لا يفقهون