Abdullah bin Abbas reported,

They claimed, "It is only the slave of Ibn Hadrami, the keeper of the books, who teaches Muhammad."So Allah said, "The tongue of the one they refer to is foreign, while this is a clear Arabic tongue" [Nahl 16:103], "Only those who do not believe in the signs of Allah fabricate lies" [Nahl 16:105].

Azami 8590

Sahih

في قوله تعالى: {إنما يعلمه بشر} [سورة النحل: ١٠٣].

عن ابن عباس قالوا

إنما يعلم محمدا عبد ابن الحضرمي وهو صاحب الكتب فقال الله: {لسان الذي يلحدون اليه اعجمي وهذا لسان عربي مبين} {انما يفتري الكذب الذين لا يؤمنون بايت الله} [سورة النحل: ١٠٣، ١٠٥].

الأعظمي 8590صحيح
Contents
Reference
Commentary
Ayat
Collection
Jami al-Kamil
Book
Biography of the Prophet ﷺ
Chapter
Mission of the Prophet ﷺ and his life in Makkah
Section
Allah diverts the insults of His enemies away from His beloved ﷺ
Numbering
Jami al-Kamil 8590 (2nd edition)
Azami 8590