Surah Al-An'am Ayah 25

وَمِنۡهُم مَّن يَسۡتَمِعُ إِلَيۡكَۖ وَجَعَلۡنَا عَلَىٰ قُلُوبِهِمۡ أَكِنَّةً أَن يَفۡقَهُوهُ وَفِيٓ ءَاذَانِهِمۡ وَقۡرٗاۚ وَإِن يَرَوۡاْ كُلَّ ءَايَةٖ لَّا يُؤۡمِنُواْ بِهَاۖ حَتَّىٰٓ إِذَا جَآءُوكَ يُجَٰدِلُونَكَ يَقُولُ ٱلَّذِينَ كَفَرُوٓاْ إِنۡ هَٰذَآ إِلَّآ أَسَٰطِيرُ ٱلۡأَوَّلِينَ ٢٥

Wa minhum may yastamiʿu ilayk, wa jaʿalnā ʿalā qulūbihim akinnatan ay yafqahūhu wa fī ādhānihim waqrā, wa iy yaraw kulla āyatil lā yuʾminū bihā, ḥattā idhā jāʾūka yujādilūnaka yaqūlul-ladhīna kafarū in hādhā illā asāṭīrul-awwalīn.

And among them are those who listen to you,¹ but We have placed over their hearts coverings, lest they understand it, and in their ears deafness. And if they should see every sign, they will not believe in it. Even when they come to you arguing with you, those who disbelieve say, "This is not but legends of the former peoples."

Translation: Sahih International