Exodus 8:2

8:2 But if you refuse to release them, then I am going to plague all your territory with frogs.

Exodus 10:4

10:4 But if you refuse to release my people, I am going to bring locusts into your territory tomorrow.

Exodus 20:2

20:2 “I, the Lord, am your God, who brought you from the land of Egypt, from the house of slavery.