Rashi on Deuteronomy 9:25/רש"י על דברים ט׳:כ״ה

1ואתנפל וגו׳ AND I FELL DOWN [BEFORE THE LORD … THE FORTY DAYS … WHICH I HAD FALLEN DOWN] — These are the very same forty days mentioned above (v. 18), and it mentions them a second time here, because there is written here (in the next verse) the wording of his prayer, as it is said, “O Lord God, destroy not thy people, etc.”.