Exodus 9:14-16

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