Rashi on Deuteronomy 32:27/רש"י על דברים ל״ב:כ״ז

1לולי כעס אויב אגור WERE IT NOT THAT THE WRATH OF THE ENEMY WAS אגור — i.e. were it not that the wrath of the enemy were heaped up (אגור) against them to destroy them, and if he does overpower them and destroy them, he will attribute the greatness to himself and to his god, and he will not attribute it to Me. That is the meaning of what is stated immediately afterwords: פן ינכרו צרימו — i.e. lest they treat the matter as arising from a stranger (ינכרו) by attributing their power to a stranger (נכרי) to whom the greatness, however, does not actually belong, פן יאמרו ידינו רמה וגו׳ LEST THEY SHOULD SAY, OUR HAND IS EXALTED etc.