Sforno on Deuteronomy 9:4/ספורנו על דברים ט׳:ד׳

1אל תאמר בלבבך בהדוף, when you see that you enjoy victory against all odds, so that you realise this victory has to be credited to your enjoying a heavenly assist, do not commit a terrible error.

2בצדקתי הביאני...לרשת, that G’d did all this on account of your being a model of righteousness, and that furthermore the speed with which all this occurred was on account of

3ברשעת הגויים האלה ה' מורישם מפניך, that the Lord dispossessed them on account of their wickedness, because He wanted His retribution against these people to be orchestrated by your destroying them. This would be the very opposite of what David prayed for when he thought G’d was punishing him. He prayed that the judgment should not be executed by man but that he preferred to be punished by G;d directly, not by one of His surrogates, especially one of his peers. (Samuel II 24,14)