9:127
وَ إِذَا مَآ أُنزِلَتْ سُورَةٌ نَّظَرَ بَعْضُ هُمْ إِلَىٰ بَعْضٍ هَلْ يَرَىٰ كُم مِّنْ أَحَدٍ ثُمَّ ٱنصَرَفُ وا۟ صَرَفَ ٱللَّهُ قُلُوبَ هُم بِ أَنَّ هُمْ قَوْمٌ لَّا يَفْقَهُ ونَ
And whenever a surah is revealed, they look at each other, [saying], "Does anyone see you?" and then they dismiss themselves. Allah has dismissed their hearts because they are a people who do not understand.