The Commentary of Verse 67 of Chapter 9 the Repentance [al-Tawbah] They have forsaken Allah, so He has forsaken them.

I asked Al-Rida `Ali ibn Musa (AS) about the Word of Allah, the Mighty and High, `they hae forsaken Allah, so He has forsaken them.’ So He (AS) said: Allah, Blessed and Exalted be He, neither forgets nor makes mistakes. Indeed, the present creation forgets and makes mistakes. Have you not heard the Mighty and High say: And your Lord is not forgetful. Verily, He punishes the one that forgets Him and forgets the meeting of this Day, and then He makes them to forget themselves. As the Mighty and High says: they forsook Allah, so He made them forsake their own souls: these it is that are the transgressors. And the Word of the Mighty and High: So today We forsake them, as they neglected the meeting of this day of theirs. That is to say “We will abandon them as they neglected to prepare themselves for this Day of Meeting.” The Compiler of this book says: The statement “He will abandon them” means that “He will not reward them” on the Day of Judgement because it is not proper for Allah, the Mighty and High, to abandon. As for the word of Allah the Mighty and High: And left them in utter darkness – they do not see; it means that He will not hasten their punishment, thus granting them time to repent.