John Gills Exposition of the Bible Commentary - Exodus 19:9
And the Lord said unto Moses ,.... As the Targum of Jonathan, on the third day; though Jarchi says the fourth; which seems not so well to agree with his words on the preceding verse, since it seems to be at the same time that Moses returned the words of the people to the Lord, that he said what follows to him: lo, I come unto thee in a thick cloud ; which was different from the pillar of cloud in which he went before the people, and now stood in it on the top of the mount; for he speaks... read more
Matthew Henry's Complete Commentary - Exodus 19:9-15
Here, I. God intimates to Moses his purpose of coming down upon mount Sinai, in some visible appearance of his glory, in a thick cloud (Exod. 19:9); for he said that he would dwell in the thick darkness (2 Chron. 6:1), and make this his pavilion (Ps. 18:11), holding back the face of his throne when he set it upon mount Sinai, and spreading a cloud upon it, Job 26:9. This thick cloud was to prohibit curious enquiries into things secret, and to command an awful adoration of that which was... read more