The Idolators' Claim that the Qur'an was taught by a Human, and the Refutation of their Claim

Allah tells us about the idolators' lies, allegations, and slander when they claimed that this Qur'an which Muhammad had recited for them, was actually taught to him by a human. They referred to a foreign (i.e., non-Arab) man who lived among them as the servant of some of the clans of Quraysh and who used to sell goods by As-Safa. Maybe the Messenger of Allah ﷺ used to sit with him sometimes and talk to him a little, but he was a foreigner who did not know much Arabic, only enough simple phrases to answer questions when he had to. So in refutation of their claims of fabrication, Allah said:

لِّسَانُ الَّذِى يُلْحِدُونَ إِلَيْهِ أَعْجَمِىٌّ وَهَـذَا لِسَانٌ عَرَبِىٌّ مُّبِينٌ

Sequence of Verses

In the previous verse (98), there was an instruction to say اَعُوذ بِاللہ 'a udhu bil-lah' (I seek protection with Allah) while reciting the Qur’ an which indicates that the Shaitan puts scruples in the heart when one recites the Qur'an. In the verses cited above, there is a refutation of such Satanic instigations.