﴿ كَذَٰلِكَ مَآ أَتَى ٱلَّذِينَ مِن قَبْلِهِم مِّن رَّسُولٍ إِلَّا قَالُوا۟ سَاحِرٌ أَوْ مَجْنُونٌ ﴾

“[But] thus it is: never yet came any apostle to those who lived before their time but they said, “A spellbinder [Lit., "sorcerer".] [is he], or a madman!””

Thus there did not come to those who were before them any messenger but they said that he was ‘A sorcerer or a madman!’ in other words their denial of you by saying that you are a sorcerer or a madman was like the denial of communities before them of their messengers by saying that same thing.