John Gills Exposition of the Bible Commentary - Exodus 19:15
And he said unto the people, be ready against the third day ,.... The third day from thence, the sixth of the month Sivan, against which day they were to prepare themselves, by washing their garments, and all other outward acts of sanctification and purity they were directed to, that they might be ready for the service of that day, to hear and receive the law from God himself: Aben Ezra has this note on the passage,"perhaps not a man slept that night, that he might hear the voice of the Lord... read more
John Gills Exposition of the Bible Commentary - Exodus 19:14
And Moses went down from the mount unto the people ,.... The same day that he went up, the fourth day of the month: and sanctified the people ; instructed them and ordered them what they should do for their sanctification, in order to their hearing the law from the mouth of the Lord: and they washed their clothes ; as the Lord had directed Moses to enjoin them, and as he had commanded them; see Gill on Exodus 19:10 . read more