Exodus 10:20

But the Lord hardened Pharaoh’s heart, and he did not let the Israelites go.

Exodus 4:21

The Lord instructed Moses, “When you go back to Egypt, make sure you do all the wonders before Pharaoh that I have put within your power. But I will harden his heart so that he won’t let the people go.

Exodus 11:10

Moses and Aaron did all these wonders before Pharaoh, but the Lord hardened Pharaoh’s heart, and he would not let the Israelites go out of his land.

Exodus 7:13-14

However, Pharaoh’s heart hardened, and he did not listen to them, as the Lord had said.

Exodus 9:12

But the Lord hardened Pharaoh’s heart and he did not listen to them, as the Lord had told Moses.

Deuteronomy 2:30

But Sihon king of Heshbon would not let us travel through his land, for the Lord your God had made his spirit stubborn and his heart obstinate in order to hand him over to you, as has now taken place.

Isaiah 6:9-10

And He replied:

Go! Say to these people:
Keep listening, but do not understand;
keep looking, but do not perceive.

John 12:39-40

This is why they were unable to believe, because Isaiah also said:

Romans 9:18

So then, He shows mercy to those He wants to, and He hardens those He wants to harden.

2 Thessalonians 2:11-12

For this reason God sends them a strong delusion so that they will believe what is false,

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