Surah Ad-Dukhan, ayah 14

ثُمَّ تَوَلَّوۡاْ عَنۡهُ وَقَالُواْ مُعَلَّمٞ مَّجۡنُونٌ ١٤

Thumma tawallaw 'anhu waqālū mu'allamum majnūn

Then they turned away from him and said, "[He was] taught [and is] a madman."