Surah Al-Qalam, ayah 51

68:51

وَإِن يَكَادُ ٱلَّذِينَ كَفَرُواْ لَيُزۡلِقُونَكَ بِأَبۡصَٰرِهِمۡ لَمَّا سَمِعُواْ ٱلذِّكۡرَ وَيَقُولُونَ إِنَّهُۥ لَمَجۡنُونٞ ٥١

Wa in yakādul-ladhīna kafarū layuzliqūnaka bi absārihim lammā sami'udh-dhikra wayaqūlūna innahū lamajnūn

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