Komentarz do Wyjścia 19:14

מן ההר אל העם [AND MOSES WENT DOWN] FROM THE MOUNTAIN UNTO THE PEOPLE —This tells us that Moses did not betake himself first to his personal concerns but went direct from the mountain to the people (Mekhilta d'Rabbi Yishmael 19:14).

AND MOSES WENT DOWN FROM THE MOUNT UNTO THE PEOPLE, AND SANCTIFIED THE PEOPLE. This verse teaches that the command expressed in the [above] verse, And the Eternal said unto Moses: Go unto the people and sanctify them,²¹⁷Above, Verse 10. was also given to him on the mountain which Moses ascended everytime that he was about to speak to Him. In the Mechilta, the Rabbis have explained:²¹⁸Mechilta on the verse here. “This teaches that Moses did not turn to his personal affairs nor go to his house at all, but he went directly from the mount unto the people.”

וירד משה מן ההר, “Moses descended from the Mountain, etc.” This is mentioned so that we the readers will know that even the instruction to Moses to ensure that the people sanctify themselves on that day and the following day were issued to Moses while he was on the Mountain. Moses ascended the Mountain every time that G’d spoke to him.