Exodus 19:3: Verse 3
Moses went up unto God - It is likely that the cloud which had conducted the Israelitish camp had now removed to the top of Sinai; and as this was the symbol of the Divine presence, Moses went up to the place, there to meet the Lord.
The Lord called unto him - This, according to St. Stephen, was the Angel of the Lord, Act 7:38. And from several scriptures we have seen that the Lord Jesus was the person intended; see Clarke's note on Gen 16:7; see Clarke's note on Gen 18:13; see Clarke's note on Exo 3:2.