Deuteronomy 9:25

ואתנפל 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.”.

וָֽאֶתְנַפַּ֞ל לִפְנֵ֣י יְהֹוָ֗ה אֵ֣ת אַרְבָּעִ֥ים הַיּ֛וֹם וְאֶת־אַרְבָּעִ֥ים הַלַּ֖יְלָה אֲשֶׁ֣ר הִתְנַפָּ֑לְתִּי כִּֽי־אָמַ֥ר יְהֹוָ֖ה לְהַשְׁמִ֥יד אֶתְכֶֽם׃

Thus I fell down before the Lord forty days and forty nights, as I fell down at the first; because the Lord had said he would destroy you.