And the Lord said to Moses, “When you go back to Egypt, see that you do all those wonders before Pharaoh which I have put in your hand. But I will harden his heart, so that he will not let the people go.
So Moses and Aaron did all these wonders before Pharaoh; and the Lord hardened Pharaoh’s heart, and he did not let the children of Israel go out of his land.
“But Sihon king of Heshbon would not let us pass through, for the Lord your God hardened his spirit and made his heart obstinate, that He might deliver him into your hand, as it is this day.
And the Lord turned a very strong west wind, which took the locusts away and blew them into the Red Sea. There remained not one locust in all the territory of Egypt.
Now the Lord said to Moses, “Go in to Pharaoh; for I have hardened his heart and the hearts of his servants, that I may show these signs of Mine before him,