Exodus 8:32

But Pharaoh hardened his heart this time also, and he did not let the people go.

Exodus 8:15

But when Pharaoh saw that there was [temporary] relief, he hardened his heart and would not listen or pay attention to them, just as the Lord had said.

The Lord said to Moses, “When you return to Egypt, see that you perform before Pharaoh all the wonders (miracles) which I have put in your hand, but I will harden his heart and make him stubborn so that he will not let the people go.

Exodus 7:13-14

Yet Pharaoh’s heart was hardened and he would not listen to them, just as the Lord had said.

Exodus 8:8

Then Pharaoh called for Moses and Aaron and said, “Plead with the Lord that He may take away the frogs from me and my people; and I will let the people go, so that they may sacrifice to the Lord.”

Isaiah 63:17

O Lord, why do You cause us to stray from Your ways
And harden our heart from fearing You [with reverence and awe]?
Return for Your servants’ sake, the tribes of Your heritage.

Acts 28:26-27

‘Go to this people and say,

“You will keep on hearing, but will not understand,
You will keep on seeing, but will not perceive;

Romans 2:5

But because of your callous stubbornness and unrepentant heart you are [deliberately] storing up wrath for yourself on the day of wrath when God’s righteous judgment will be revealed.

James 1:13-14

Let no one say when he is tempted, “I am being tempted by God” [for temptation does not originate from God, but from our own flaws]; for God cannot be tempted by [what is] evil, and He Himself tempts no one.

Treasury of Scripture Knowledge

Summary