Exodus 9:12-14 Modern English Version (MEV)
12 Moreover, the Lord hardened the heart of Pharaoh, so that he did not listen to them, just as the Lord had spoken to Moses.
The Seventh Plague: Hail
13 Then the Lord said to Moses, “Rise up early in the morning, and stand before Pharaoh, and say to him, ‘Thus says the Lord, the God of the Hebrews: Let My people go, so that they may serve Me. 14 For I will at this time send all My plagues upon you and your servants and your people, so that you may know that there is none like Me in all the earth.