Surah Al-Mu'minun 23:70

أَمْ يَقُولُونَ بِهِۦ جِنَّةٌۢ ۚ بَلْ جَآءَهُم بِٱلْحَقِّ وَأَكْثَرُهُمْ لِلْحَقِّ كَـٰرِهُونَ

Or do they say, "In him is madness"? Rather, he brought them the truth, but most of them, to the truth, are averse.

Translation: Saheeh International

Tafsir

Or do they say ‘There is a madness in him’? — this interrogative is meant as an affirmation of the truth of the Prophet’s sincerity and of the fact that messengers did come to past communities and of the fact that they do indeed recognise their Messenger to be truthful and trustworthy and of the fact that there is no …

Excerpt from Tafsir al-Jalalayn, commentary on 23:70, via Quran.com. The reader has the full commentary and 9 more tafsirs.