Chapter 41 Sign 5

وَقَالُواْ قُلُوبُنَا فِيٓ أَكِنَّةٖ مِّمَّا تَدۡعُونَآ إِلَيۡهِ وَفِيٓ ءَاذَانِنَا وَقۡرٞ وَمِنۢ بَيۡنِنَا وَبَيۡنِكَ حِجَابٞ فَٱعۡمَلۡ إِنَّنَا عَٰمِلُونَ٥

And they say “Our hearts in shielding from what you call us to it, and in our ears heaviness, and from between us and between you a barrier, but do, absolutely surely we doing.”