Exodus 8:32

Yet Pharaoh’s heart was hardened with strength, and he did not listen to them, as Yahweh had spoken.

Then Pharaoh called for Moses and Aaron and said, “Entreat Yahweh that He may cause the frogs to depart from me and from my people; and I will let the people go, that they may sacrifice to Yahweh.”

And Pharaoh said, “I will let you go, that you may sacrifice to Yahweh your God in the wilderness; only you shall not go very far away. Entreat for me.”

And Pharaoh sent, and behold, there was not even one of the livestock of Israel dead. But the heart of Pharaoh was hardened with firmness, and he did not let the people go.

“Why then do you harden your hearts as the Egyptians and Pharaoh hardened their hearts? When He had abused them, did they not allow the people to go, and they went?

“Then You performed signs and wonders against Pharaoh, Against all his servants and all the people of his land; For You knew that they acted presumptuously toward them, And made a name for Yourself as it is this day.