﴿وَإِنْ يَكَادُ الَّذِينَ كَفَرُوا لَيُزْلِقُونَكَ بِأَبْصَارِهِمْ لَمَّا سَمِعُوا الذِّكْرَ وَيَقُولُونَ إِنَّهُ لَمَجْنُونٌ﴾
51. And verily, those who disbelieve would almost make you slip with their eyes (through hatred) when they hear the Reminder (the Qur’ân), and they say: "Verily, he (Muhammad ﷺ) is a madman!"