Surah An-Nahl, Verse 103

وَلَقَدۡ نَعۡلَمُ أَنَّهُمۡ يَقُولُونَ إِنَّمَا يُعَلِّمُهُۥ بَشَرࣱۗ لِّسَانُ ٱلَّذِي يُلۡحِدُونَ إِلَيۡهِ أَعۡجَمِيࣱّ وَهَٰذَا لِسَانٌ عَرَبِيࣱّ مُّبِينٌ ﴿١٠٣﴾

Ve le kad na´lemü ennehüm yekulune innema yüallimühu beşar lisanüllezı yulhıdune ileyhi a´cemiyyüv ve haza lisanün arabiyyüm mübın

“We know indeed that they say, "It is a man that teaches him." The tongue of him they wickedly point to is notably foreign, while this is Arabic, pure and clear”