Romans 9:17

For the Scripture says to Pharaoh, It is for this very purpose that I have raised you up, To show in you my power, And to proclaim my name far and wide, in all the earth.

Romans 9:22-23

But what if God, while intending to show forth his wrath, and to make known his power, yet endured, with much long-suffering, vessels of wrath, fitted to destruction?

Romans 11:8

According as it is written, God has given them a spirit of slumber, Eyes that they should not see, Ears that they should not hear, unto this day.

Revelation 19:1-6

After this I heard the semblance of the mighty voice of a great multitude in heaven, crying. "Hallelujah! Salvation and glory and power Unto the Lord our God!

Treasury of Scripture Knowledge

Summary

And I will harden Pharaoh's heart, that he shall follow after them; and I will be honoured upon Pharaoh, and upon all his host; that the Egyptians may know that I am the LORD. And they did so.

Harden

Bible References

Harden

Romans 11:8
According as it is written, God has given them a spirit of slumber, Eyes that they should not see, Ears that they should not hear, unto this day.