וְאָנֹכִ֞י עָמַ֣דְתִּי בָהָ֗ר כַּיָּמִים֙ הָרִ֣אשֹׁנִ֔ים אַרְבָּעִ֣ים י֔וֹם וְאַרְבָּעִ֖ים לָ֑יְלָה וַיִּשְׁמַ֨ע יְהוָ֜ה אֵלַ֗י גַּ֚ם בַּפַּ֣עַם הַהִ֔וא לֹא־אָבָ֥ה יְהוָ֖ה הַשְׁחִיתֶֽךָ׃
J’étais donc resté sur la montagne, comme la première fois, quarante jours et quarante nuits; et l’Éternel m’exauça cette fois encore, il ne voulut pas t’exterminer,
Rashi
ואנכי עמדתי בהר AND I REMAINED ON THE MOUNT to receive the last (second) tablets. — Since it does not state above (v. 2) how long he remained on the mount at this last ascent, he begins again with it (with that incident).
Chizkuni
גם בפעם ההוא, “also on that occasion.” He did so with a friendly mien. He did so in order that the Holy name should not become desecrated, as I had said in my prayer. (Deut. 9.28) However, once you will have defeated the thirty one Canaanite kings and you have taken over their land, if you would commence to sin again, even prayers would not help, as in the meantime G-d had demonstrated that He had kept His part of the bargain, i.e. that He had not been too weak to overcome those nations. The people then would ask why disaster had overtaken the Jews (Compare Deut. 29,23) and they would conclude that it had been their fault, not that of their G-d.
Da'at Zekenim
ואנכי עמדתי בהר, “and I had stayed on the Mountain;” in preparation of receiving the second set of Tablets after G–d had inscribed them; all the time pleading further for G–d to forgive His people’s sin completely.