Exodus 10:1-2

1Then the Lord said to Moses, ‘Go to see Pharaoh. I have caused his mind to become hard. I have also caused his officers' minds to become hard. I have done this so that I can do miracles to show him my power.

2In the future, you can tell your children and your children's children how I punished the Egyptians. You can tell them about the miracles that I did among the Egyptians. In this way, you will know that I am the Lord.’