בַּעֲלֹתִ֣י הָהָ֗רָה לָקַ֜חַת לוּחֹ֤ת הָֽאֲבָנִים֙ לוּחֹ֣ת הַבְּרִ֔ית אֲשֶׁר־כָּרַ֥ת יְהוָ֖ה עִמָּכֶ֑ם וָאֵשֵׁ֣ב בָּהָ֗ר אַרְבָּעִ֥ים יוֹם֙ וְאַרְבָּעִ֣ים לַ֔יְלָה לֶ֚חֶם לֹ֣א אָכַ֔לְתִּי וּמַ֖יִם לֹ֥א שָׁתִֽיתִי׃
那時我上了山，要領受兩塊石版，就是永恆者與你們所立之約的約版。我在山上停留了四十晝夜，沒有吃飯，也沒有喝水。
Rashi
ואשב בהר — The verb ישב here means only "staying" (not "sitting"; it means: I stayed on the mountain) (Megillah 21a).
Chizkuni
בעלותי ההרה, “while I ascended the Mountain.” This occurred on the first day of the week, the seventh day of the month of Sivan. [That is, Moses ascended Mount Sinai on the day following the Revelation which was on the Sabbath, the sixth of Sivan. Ed.]
Siftei Chakhamim
In this sense, the word ישיבה means remaining. I.e., the expression ישיבה stated here means, “remaining.” Otherwise there is a difficulty from a verse written later (10:10), “I stood on the mountain.”