The Mountain - 52:32
Do they say this under the influence of their dreams, or are they a transgressing people?
Related:
The Ornaments of Gold/43:5
Shall We stop conveying the Message to you because you are a transgressing people?
The Repentance/9:97
The Arabs are the most extreme in disbelief and hypocrisy. They are the closest to not recognizing what Allah has revealed to His Messenger. Allah is All-Knowing, All-Wise.