On the 6th of Sivan, or the 7th according to Rabbi Yose, Moshe leads the people to the base of the mountain. We are informed, parenthetically, that during Matan Torah the people are destined to hear only two commandments directly. As for the others, Moshe will speak and HaShem will amplify his voice. HaShem reveals his throne upon the mountain and summons Moshe. Moshe is told to warn the people again not to approach the mountain.
Moshe protests that the people have already been warned.
HaShem tells him that he must do so nevertheless. Then he is to return to the mountain. Aharon and the first born, who are the priests at this point, are to approach, each according to his level. Moshe descends and passes on the information. This is the assent foretold above, paragraph 9.