Surah Al-Qalam, Verse 51

وَإِن يَكَادُ ٱلَّذِينَ كَفَرُواْ لَيُزۡلِقُونَكَ بِأَبۡصَٰرِهِمۡ لَمَّا سَمِعُواْ ٱلذِّكۡرَ وَيَقُولُونَ إِنَّهُۥ لَمَجۡنُونٞ٥١

wa-in yakādu alladhīna kafarū layuz'liqūnaka bi-abṣārihim lammā samiʿū l-dhik'ra wayaqūlūna innahu lamajnūnun

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."