And the LORD said unto Moses, When thou goest back into Egypt, see that thou do before Pharaoh all the wonders which I have put in thine hand: but I will harden his heart, and he will not let the people go.
And 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 by him: for the LORD thy God hardened his spirit, and made his heart obstinate, that he might deliver him into thy hand, as at this day.
And the LORD turned an exceeding strong west wind, which took up the locusts, and drove them into the Red Sea; there remained not one locust in all the border of Egypt.
And the LORD said unto Moses, Go in unto Pharaoh: for I have hardened his heart, and the heart of his servants, that I might shew these my signs in the midst of them: