I make a covenant — i.e., “I lay down afresh the terms of the covenant which I am content to make with Israel. I will go with them, and drive out the nations before them (Exodus 34:11), and work miracles on their behalf (Exodus 34:10), and enlarge their borders (Exodus 34:24), and prevent their enemies from desiring their land at the festival seasons (Exodus 34:24); they, on their part, must ‘observe that which I command them this day.’” The “command” given included the moral law, as laid down in the Ten Commandments (Exodus 34:28), and a summary of the chief points contained in the “Book of the Covenant,” which must be regarded as a re-publication and re-authorisation of that book.
Marvels, such as have not been done in all the earth — e.g., the drying up of Jordan (Joshua 3:16-17), the falling down of the walls of Jericho (Joshua 6:20), the destruction of the army of the five kings by hailstones (Joshua 10:11), and the like.
A terrible thing. — Comp. Deuteronomy 10:21; Psalms 106:22; Psalms 145:6. God is “terrible” to the enemies of His people.