وَإِذا قيلَ لَهُمُ اسجُدوا لِلرَّحمـٰنِ قالوا وَمَا الرَّحمـٰنُ أَنَسجُدُ لِما تَأمُرُنا وَزادَهُم نُفورًا ۩

When told to prostrate before the Merciful, they ask, “Who is this Merciful? Should we prostrate before whatever you command us?” And it intensifies their defiance.