And the Lord said to Moses, “When you go back to Egypt, see that you do before Pharaoh all the miracles which I have put in your power; but I will harden his heart, so that he will not let the people go.
Then Pharaoh called Moses and Aaron, and said, “Entreat the Lord to take away the frogs from me and from my people; and I will let the people go to sacrifice to the Lord.”
And Pharaoh sent, and behold, not one of the cattle of the Israelites was dead. But the heart of Pharaoh was hardened, and he did not let the people go.
O Lord, why dost thou make us err from thy ways and harden our heart, so that we fear thee not? Return for the sake of thy servants, the tribes of thy heritage.
Why should you harden your hearts as the Egyptians and Pharaoh hardened their hearts? After he had made sport of them, did not they let the people go, and they departed?