16:103 An-Nahl (The Bee)
وَلَقَدۡ نَعۡلَمُ أَنَّهُمۡ يَقُولُونَ إِنَّمَا يُعَلِّمُهُۥ بَشَرࣱۗ لِّسَانُ ٱلَّذِي يُلۡحِدُونَ إِلَيۡهِ أَعۡجَمِيࣱّ وَهَٰذَا لِسَانٌ عَرَبِيࣱّ مُّبِينٌ
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
And We know well that they say: Only a man teacheth him. The speech of him at whom they falsely hint is outlandish, and this is clear Arabic speech
And indeed We know that they (polytheists and pagans) say: "It is only a human being who teaches him." The tongue of the man they refer to is foreign, while this (the Qur'an) is (in) a clear Arabic tongue