Al-An‘âm 6:25
وَمِنْهُم مَّن يَسْتَمِعُ إِلَيْكَ ۖ وَجَعَلْنَا عَلَىٰ قُلُوبِهِمْ أَكِنَّةً أَن يَفْقَهُوهُ وَفِي آذَانِهِمْ وَقْرًا ۚ وَإِن يَرَوْا كُلَّ آيَةٍ لَّا يُؤْمِنُوا بِهَا ۚ حَتَّىٰ إِذَا جَاءُوكَ يُجَادِلُونَكَ يَقُولُ الَّذِينَ كَفَرُوا إِنْ هَٰذَا إِلَّا أَسَاطِيرُ الْأَوَّلِينَ ٢٥
Waminhum man yastamiAAu ilayka wajaAAalna AAala quloobihim akinnatan an yafqahoohu wafee athanihim waqran wain yaraw kulla ayatin la yuminoo biha hatta itha jaooka yujadiloonaka yaqoolu allatheena kafaroo in hatha illa asateeru alawwaleena
And some of them there are that listen to thee, and We lay veils upon their hearts lest they understand it, and in their ears heaviness; and if they see any sign whatever, they do not believe in it, so that when they come to thee they dispute with thee, the unbelievers saying, ’This is naught but the fairy-tales of the ancient ones.’ (6:25)