Surah At-Takwir, ayah 22

وَمَا صَاحِبُكُم بِمَجۡنُونٖ ٢٢

Wamā sāhibukum bimajnūn

And your companion [i.e., Prophet Muḥammad (ﷺ) ] is not [at all] mad.¹⁸⁷¹