Qur'ān 52:29 · At-Tur (الطور)

فَذَكِّرْ فَمَآ أَنتَ بِنِعْمَتِ رَبِّكَ بِكَاهِنٍۢ وَلَا مَجْنُونٍ

So remind [O Muhammad], for you are not, by the favor of your Lord, a soothsayer or a madman.