Thus, the Messenger is immune from any satanic descent, whether in matters he conveys deliberately or in what might otherwise be considered a slip. This is not the case for those other than the Messenger: they may err, and their error comes from Satan—though such mistakes are forgiven. Now, since no report he conveyed is known in which he was mistaken, and no command of his involved any wrongdoing, it is evident that Satan never descended upon him; rather, the one who comes to him is an honored angel.
For this reason, the Almighty has said in another verse about the Prophet:
“Indeed, it is truly the word of a noble messenger; it is not the word of a poet—how little you believe! Nor is it the speech of a soothsayer—how little you take heed! It is a revelation sent down from the Lord of all beings.” (Surah al-Haqqah 69:40-43)