Sforno on Deuteronomy 31:29/ספורנו על דברים ל״א:כ״ט

1כי ידעתי, in the course of that song (poem) I will reveal that I know how you will act so that the evil, if and when it befalls you, will not be perceived as “bad luck,” as coincidence, but can be traced back to my warnings. Once you realise and admit hat you had become guilty of a corrupt way of life, you will repent and turn to G’d in sincere remorse. Compare Isaiah 48,5 ואגיד לך מאז, בטרם תבוא השמעתיך, פן תאמר עצבי אשם, “Therefore I told you long beforehand, announced things to you before they happened, that you might not say: “my idol caused them.”