saw

Exodus 14:5
When the king of Egypt was told that the people had fled, Pharaoh and his officials changed their minds about them and said, "What have we done? We have released Israel from serving us."

Ecclesiastes 8:11
When the sentence for a crime is not speedily executed, the hearts of men become fully set on doing evil.

Isaiah 26:10
Though grace is shown to the wicked man, he does not learn righteousness. In the land of righteousness he acts unjustly and fails to see the majesty of the LORD.

Jeremiah 34:7-11
as the army of the king of Babylon was fighting against Jerusalem and the remaining cities of Judah--against Lachish and Azekah. For these were the only remaining fortified cities left in Judah. . . .

Hosea 6:4
What shall I do with you, O Ephraim? What shall I do with you, O Judah? For your loyalty is like a morning mist, like the early dew that vanishes.

he hardened

Exodus 4:21
The LORD instructed Moses, "When you go back to Egypt, see that you perform before Pharaoh all the wonders that I have put within your power. But I will harden his heart so that he will not let the people go.

Exodus 7:4, 13, 14
Pharaoh will not listen to you. Then I will lay My hand on Egypt, and by mighty acts of judgment I will bring the divisions of My people the Israelites out of the land of Egypt. . . .

Proverbs 29:1
A man who remains stiff-necked after much reproof will suddenly be shattered beyond recovery.

Zechariah 7:11, 12
But they refused to pay attention and turned a stubborn shoulder; they stopped up their ears from hearing. . . .

Hebrews 3:8, 15
do not harden your hearts, as you did in the rebellion, in the time of testing in the wilderness, . . .

Revelation 16:9
And the people were scorched by intense heat, and they cursed the name of God, who had authority over these plagues; yet they did not repent and give Him glory.