וַיֵּ֧רֶד מֹשֶׁ֛ה מִן־הָהָ֖ר אֶל־הָעָ֑ם וַיְקַדֵּשׁ֙ אֶת־הָעָ֔ם וַֽיְכַבְּס֖וּ שִׂמְלֹתָֽם׃
모세가 산에서 내려 백성에게 이르러 백성으로 성결케 하니 그들이 자기 옷을 빨더라
Rashi
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).
Chizkuni
וירד משה, “Moses descended;” on this same day, the fourth of the month, a Thursday.
Ramban
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.”