أَفَلَمْ يَسِيرُوا فِى ٱلْأَرْضِ فَتَكُونَ لَهُمْ قُلُوبٌ يَعْقِلُونَ بِهَآ أَوْ ءَاذَانٌ يَسْمَعُونَ بِهَا ۖ فَإِنَّهَا لَا تَعْمَى ٱلْأَبْصَـٰرُ وَلَـٰكِن تَعْمَى ٱلْقُلُوبُ ٱلَّتِى فِى ٱلصُّدُورِ

Afalam yaseeroo fee al-ardi fatakoonalahum quloobun yaAAqiloona biha aw athanunyasmaAAoona biha fa-innaha la taAAmaal-absaru walakin taAAma alquloobu allateefee assudoor

So have they not traveled through the earth and have hearts by which to reason and ears by which to hear? For indeed, it is not eyes that are blinded, but blinded are the hearts which are within the breasts.