Surah Al-A'raf, Verse 184

أَوَلَمۡ يَتَفَكَّرُواْۗ مَا بِصَاحِبِهِم مِّن جِنَّةٍۚ إِنۡ هُوَ إِلَّا نَذِيرٞ مُّبِينٌ١٨٤

awalam yatafakkarū mā biṣāḥibihim min jinnatin in huwa illā nadhīrun mubīnun

Then do they not give thought? There is in their companion [i.e., Muḥammad (ﷺ)] no madness. He is not but a clear warner.