﴿ أَفَلَمْ يَسِيرُوا۟ فِى ٱلْأَرْضِ فَتَكُونَ لَهُمْ قُلُوبٌۭ يَعْقِلُونَ بِهَآ أَوْ ءَاذَانٌۭ يَسْمَعُونَ بِهَا ۖ فَإِنَّهَا لَا تَعْمَى ٱلْأَبْصَٰرُ وَلَٰكِن تَعْمَى ٱلْقُلُوبُ ٱلَّتِى فِى ٱلصُّدُورِ ﴾

“Have they, then, never journeyed about the earth, letting their hearts gain wisdom, and causing their ears to hear? Yet, verily, it is not their eyes that have become blind - but blind have become the hearts that are in their breasts!”

Have they namely the disbelievers of Mecca not travelled in the land so that they may have hearts with which to comprehend what befell deniers before them or ears with which to hear? the stories of how they were destroyed and their dwelling-places were ruined and so take heed? Indeed it is not the eyes that turn blind but it is the hearts that turn blind within the breasts allatī fī’l-sudūr for emphasis.