وَإِذا بُشِّرَ أَحَدُهُم بِما ضَرَبَ لِلرَّحمـٰنِ مَثَلًا ظَلَّ وَجهُهُ مُسوَدًّا وَهُوَ كَظيمٌ

When one of them is informed of what he attributes to the Most Merciful, his face darkens, and he is repressed with grief.