Exodus 9:13-16

13Then the Lord said to Moses, “Get up early in the morning and present yourself to Pharaoh. Tell him: This is what the Lord, the God of the Hebrews says: Let my people go, so that they may worship me.

14For this time I am about to send all my plagues against you, your officials, and your people. Then you will know there is no one like me on the whole earth.

15By now I could have stretched out my hand and struck you and your people with a plague, and you would have been obliterated from the earth.

16However, I have let you live for this purpose: to show you my power and to make my name known on the whole earth.