Exodus 3:20

3:20 So I will extend my hand and strike Egypt with all my wonders that I will do among them, and after that he will release you.

Exodus 4:21

4:21 The Lord said to Moses, “When you go back to Egypt, see that you do before Pharaoh all the wonders I have put under your control. But I will harden his heart and he will not let the people go.

Exodus 11:1

The Tenth Blow: Death

11:1 The Lord said to Moses, “I will bring one more plague on Pharaoh and on Egypt; after that he will release you from this place. When he releases you, he will drive you out completely from this place.