Surah An-Nahl Ayahs #107 Translated in English

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, and this [recitation, i.e., Qur’ān] is [in] a clear Arabic language.

Indeed, those who do not believe in the verses of Allāh - Allāh will not guide them, and for them is a painful punishment.

They only invent falsehood who do not believe in the verses of Allāh, and it is those who are the liars.

Whoever disbelieves in [i.e., denies] Allāh after his belief... except for one who is forced [to renounce his religion] while his heart is secure in faith. But those who [willingly] open their breasts to disbelief, upon them is wrath from Allāh, and for them is a great punishment;

That is because they preferred the worldly life over the Hereafter and that Allāh does not guide the disbelieving people.