And the Lord said to Moses, Go in to Pharaoh: for I have made his heart and the hearts of his servants hard, so that I may let my signs be seen among them:
Go to Pharaoh in the morning; when he goes out to the water, you will be waiting for him by the edge of the Nile, with the rod which was turned into a snake in your hand;
And Pharaoh sent and got word that there was no loss of any of the cattle of Israel. But the heart of Pharaoh was hard and he did not let the people go.
And they made their hearts like the hardest stone, so that they might not give ear to the law and the words which the Lord of armies had said by the earlier prophets: and there came great wrath from the Lord of armies.
But Sihon, king of Heshbon, would not let us go through; for the Lord your God made his spirit hard and his heart strong, so that he might give him up into your hands as at this day.
See that you give ear to his voice which comes to you. For if those whose ears were shut to the voice which came to them on earth did not go free from punishment, what chance have we of going free if we give no attention to him whose voice comes from heaven?
Why do you make your hearts hard, like the hearts of Pharaoh and the Egyptians? When he had made sport of them, did they not let the people go, and they went away?