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 16:28

16:28 So the Lord said to Moses, “How long do you refuse to obey my commandments and my instructions?