Joshua 11:20

For it was the Lord’s intention to harden their hearts, so that they would engage Israel in battle, be completely destroyed without mercy, and be annihilated, just as the Lord had commanded Moses.

Deuteronomy 20:16-17

However, you must not let any living thing survive among the cities of these people the Lord your God is giving you as an inheritance.

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.

Deuteronomy 7:16

You must destroy all the peoples the Lord your God is delivering over to you and not look on them with pity. Do not worship their gods, for that will be a snare to you.

Romans 9:18

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

Exodus 9:16

However, I have let you live for this purpose: to show you My power and to make My name known in all the earth.

Exodus 14:17

I am going to harden the hearts of the Egyptians so that they will go in after them, and I will receive glory by means of Pharaoh, all his army, and his chariots and horsemen.

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.

Joshua 11:12-15

Joshua captured all these kings and their cities and struck them down with the sword. He completely destroyed them, as Moses the Lord’s servant had commanded.

Judges 14:4

Now his father and mother did not know this was from the Lord, who was seeking an occasion against the Philistines. At that time, the Philistines were ruling over Israel.

1 Samuel 2:25

If a man sins against another man, God can intercede for him, but if a man sins against the Lord, who can intercede for him?” But they would not listen to their father, since the Lord intended to kill them.

1 Kings 12:15

The king did not listen to the people, because this turn of events came from the Lord to carry out His word, which the Lord had spoken through Ahijah the Shilonite to Jeroboam son of Nebat.

1 Kings 22:20-23

And the Lord said, ‘Who will entice Ahab to march up and fall at Ramoth-gilead?’ So one was saying this and another was saying that.

2 Chronicles 25:16

While he was still speaking to him, the king asked, “Have we made you the king’s counselor? Stop, why should you lose your life?”

So the prophet stopped, but he said, “I know that God intends to destroy you, because you have done this and have not listened to my advice.”

Isaiah 6:9-10

And He replied:

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

Romans 9:22-23

And what if God, desiring to display His wrath and to make His power known, endured with much patience objects of wrath ready for destruction?

Treasury of Scripture Knowledge

Summary

For it was of the LORD to harden their hearts, that they should come against Israel in battle, that he might destroy them utterly, and that they might have no favour, but that he might destroy them, as the LORD commanded Moses.

Bible References

It was

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 9:16
However, I have let you live for this purpose: to show you My power and to make My name known in all the earth.
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.
Judges 14:4
Now his father and mother did not know this was from the Lord, who was seeking an occasion against the Philistines. At that time, the Philistines were ruling over Israel.
1 Samuel 2:25
If a man sins against another man, God can intercede for him, but if a man sins against the Lord, who can intercede for him?” But they would not listen to their father, since the Lord intended to kill them.
1 Kings 12:15
The king did not listen to the people, because this turn of events came from the Lord to carry out His word, which the Lord had spoken through Ahijah the Shilonite to Jeroboam son of Nebat.
1 Kings 22:20
And the Lord said, ‘Who will entice Ahab to march up and fall at Ramoth-gilead?’ So one was saying this and another was saying that.
2 Chronicles 25:16
While he was still speaking to him, the king asked, “Have we made you the king’s counselor? Stop, why should you lose your life?”

So the prophet stopped, but he said, “I know that God intends to destroy you, because you have done this and have not listened to my advice.”
Isaiah 6:9
And He replied:

Go! Say to these people:
Keep listening, but do not understand;
keep looking, but do not perceive.
Romans 9:18
So then, He shows mercy to those He wants to, and He hardens those He wants to harden.

As the lord

Joshua 11:12
Joshua captured all these kings and their cities and struck them down with the sword. He completely destroyed them, as Moses the Lord’s servant had commanded.
Deuteronomy 20:16
However, you must not let any living thing survive among the cities of these people the Lord your God is giving you as an inheritance.

Holman Christian Standard Bible®, Copyright © 1999, 2000, 2002, 2003, 2009 by Holman Bible Publishers.