Exodus 14:4

And Yahweh said to Moses, “When you go to return to Egypt, see to it that all the miraculous wonders which I have put in your hand, that you do them before Pharaoh; but as for Me, I will harden his heart with strength so that he will not let the people go.

“Then the Egyptians shall know that I am Yahweh, when I stretch out My hand against Egypt and bring out the sons of Israel from their midst.”

But Yahweh hardened Pharaoh’s heart with strength, and he was not willing to let them go.

And Yahweh hardened the heart of Pharaoh, king of Egypt, with strength, and he pursued the sons of Israel as the sons of Israel were going out with an exalted hand.

“As for Me, behold, I will harden the hearts of the Egyptians with strength so that they will go in after them; and I will be glorified through Pharaoh and all his army, through his chariots and his horsemen.

Then the Egyptians pursued them, and all Pharaoh’s horses, his chariots and his horsemen went in after them into the midst of the sea.

And He caused their chariot wheels to swerve, and He made them drive with difficulty; so the Egyptians said, “Let us flee from Israel, for Yahweh is fighting for them against the Egyptians.”

Then Moses said to Aaron, “It is what Yahweh spoke, saying, ‘By those who come near Me I will be treated as holy, And before all the people I will be glorified.’” So Aaron kept silent.

‘And I brought your fathers out of Egypt, and you came to the sea; and Egypt pursued your fathers with chariots and horsemen to the Red Sea.

“When I make the land of Egypt a desolation, And the land is desolate of its fullness, When I strike all those who inhabit it, Then they shall know that I am Yahweh.

So then He has mercy on whom He desires, and He hardens whom He desires.