Surah Al-A'raf, ayah 184

أَوَلَمۡ يَتَفَكَّرُواْۗ مَا بِصَاحِبِهِم مِّن جِنَّةٍۚ إِنۡ هُوَ إِلَّا نَذِيرٞ مُّبِينٌ ١٨٤

Awalam yatafakkarū mā bisāhibihim min jinnatin in huwa illā nadhīrum mubīn

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