(103) And We certainly know that they say, "It is only a human being who teaches him [i.e., the Prophet (ﷺ)]." The tongue of the one they refer to is foreign,[715] and this [recitation, i.e., Qur’ān] is [in] a clear Arabic language.
[715]- Having seen the Prophet (ﷺ) speaking with a foreign man on occasion, the Quraysh accused him of repeating the man's words.
الترجمة الإنجليزية - صحيح انترناشونال