Exodus 3:19

3:19 But I know that the king of Egypt will not let you go, not even under force.

Exodus 7:4

7:4 Pharaoh will not listen to you. I will reach into Egypt and bring out my regiments, my people the Israelites, from the land of Egypt with great acts of judgment.

Exodus 10:1

The Eighth Blow: Locusts

10:1 The Lord said to Moses, “Go to Pharaoh, for I have hardened his heart and the heart of his servants, in order to display these signs of mine before him,

Romans 9:16-18

9:16 So then, it does not depend on human desire or exertion, but on God who shows mercy. 9:17 For the scripture says to Pharaoh: “For this very purpose I have raised you up, that I may demonstrate my power in you, and that my name may be proclaimed in all the earth.” 9:18 So then, God has mercy on whom he chooses to have mercy, and he hardens whom he chooses to harden.