Quran 44:14 from Surah Ad-Dukhaan on Divine Marvels.
ثُمَّ تَوَلَّوۡاْ عَنۡهُ وَقَالُواْ مُعَلَّمٞ مَّجۡنُونٌ
English translation: Then they turned away from him and said One taught a mad man
Transliteration: thumma tawallaw anhu waqalu mu'allamun majnunun