Al-Qalam 68:51

وَإِن يَكَادُ ٱلَّذِينَ كَفَرُواْ لَيُزۡلِقُونَكَ بِأَبۡصَٰرِهِمۡ لَمَّا سَمِعُواْ ٱلذِّكۡرَ وَيَقُولُونَ إِنَّهُۥ لَمَجۡنُونٞ 51

And indeed, those who disbelieve would almost make you slip with their eyes when they hear the message, and they say, "Indeed, he is mad