"And Moses came down from the mountain to the people" (Exodus 19:14). This teaches that Moses did not turn aside to his own affairs, nor did he go down into his own house, but went straight from the mountain to the people. From this I know only of the utterances spoken at Mount Sinai. From where do I learn this also of the utterances spoken at the Tent of Meeting? Scripture teaches, saying, "And he went out and spoke to the children of Israel" (Exodus 34:34). And from where do I learn that on all the ascents that he made, he would go up in the morning? As it is said, "And be ready by the morning" and so forth, "and he carved two tablets of stone" and so forth (Exodus 34:2). For Scripture need not have added "as the LORD commanded him"; rather this establishes a governing principle that whenever he would go up, it was in the morning.
Moses Came Down From the Mountain Straight to the People
Yalkut Shimoni on Torah 281:2
(שמות יט יד) וַיֵּרֶד מֹשֶׁה מִן הָהָר אֶל הָעָם, מְלַמֵּד שֶׁלֹּא הָיָה מֹשֶׁה פּוֹנֶה לַעֲסָקָיו וְלֹא הָיָה יוֹרֵד בְּתוֹךְ בֵּיתוֹ, אֶלָּא מִן הָהָר אֶל הָעָם. אֵין לִי אֶלָּא דִּבְּרוֹת הַר סִינַי, דִּבְּרוֹת אֹהֶל מוֹעֵד מִנַּיִן, תַּלְמוּד לוֹמַר (שמות לד, לד) "וְיָצָא וְדִבֵּר אֶל בְּנֵי יִשְׂרָאֵל", וּמִנַּיִן לְכָל הָעֲלִיּוֹת שֶׁהָיָה עוֹלֶה בַּבֹּקֶר הָיָה עוֹלֶה, שֶׁנֶּאֱמַר (שמות לד, ב) "וֶהְיֵה נָכוֹן לַבֹּקֶר" וְגוֹ' "וַיִּפְסֹל שְׁנֵי לֻחֹת אֲבָנִים" וְגוֹ' שֶׁאֵין תַּלְמוּד לוֹמַר "כַּאֲשֶׁר צִוָּה ה' אֹתוֹ", אֶלָּא זֶה בִּנְיַן אָב כָּל זְמַן שֶׁהָיָה עוֹלֶה, בַּבֹּקֶר הָיָה.