Surah An-Nahl Verse 103 - English Translation by George Sale
Surah An-Nahlوَلَقَدۡ نَعۡلَمُ أَنَّهُمۡ يَقُولُونَ إِنَّمَا يُعَلِّمُهُۥ بَشَرٞۗ لِّسَانُ ٱلَّذِي يُلۡحِدُونَ إِلَيۡهِ أَعۡجَمِيّٞ وَهَٰذَا لِسَانٌ عَرَبِيّٞ مُّبِينٌ
We also know that they say, verily, a certain man teacheth him to compose the Koran. The tongue of the person unto whom they incline, is a foreign tongue; but this, wherein the Koran is written, is the perspicuous Arabic tongue