Exodus 3:20 in the King James Version
And I will stretch out my hand, and smite Egypt with all my wonders which I will do in the midst thereof: and after that he will let you go.
Context
19 I know that the king of Egypt won’t give you permission to go, no, not by a mighty hand.
20 I will reach out my hand and strike Egypt with all my wonders which I will do among them, and after that he will let you go.
21 I will give this people favor in the sight of the Egyptians, and it will happen that when you go, you shall not go empty-handed.