Exodus 8:15
But when Pharaoh saw that there was respite, he hardened his heart and did not hearken unto them as the LORD had said.
Exodus 7:4
And Pharaoh shall not hearken unto you, but I shall lay my hand upon Egypt and bring forth my hosts, and my people, the sons of Israel, out of the land of Egypt by great judgments.
Ecclesiastes 8:11
Because the sentence against an evil work is not executed speedily, therefore the heart of the sons of men is fully set in them to do evil.
Exodus 4:21
And the LORD said unto Moses, When thou goest to return into Egypt, see that thou do all those wonders before Pharaoh, which I have put in thine hand; but I will harden his heart, that he shall not let the people go.
Exodus 7:13-14
And Pharaoh's heart became hard, that he hearkened not unto them as the LORD had said.
Exodus 14:5
And it was told the king of Egypt how the people fled; and the heart of Pharaoh and of his slaves was turned against the people, and they said, Why have we done this, that we have let Israel go from serving us?
Proverbs 29:1
He that being often reproved hardens his neck shall suddenly be destroyed and that without remedy.
Isaiah 26:10
Let favour be showed to the wicked, yet will he not learn righteousness: in the land of uprightness he will deal unjustly and will not behold the majesty of the LORD.
Jeremiah 34:7-11
when the king of Babylon's army fought against Jerusalem and against all the cities of Judah that were left, against Lachish, and against Azekah, for of the strong cities of Judah these had remained.
Hosea 6:4
O Ephraim, what shall I do unto thee? O Judah, what shall I do unto thee? Your mercy is as a morning cloud, and as the early dew it goes away.
Zechariah 7:11-12
But they refused to hearken and pulled away the shoulder and stopped their ears that they should not hear.
Hebrews 3:8
harden not your hearts, as in the provocation, in the day of temptation in the wilderness:
Hebrews 3:15
while it is said, Today if ye will hear his voice, harden not your hearts, as in the provocation.
Revelation 16:9
And men were scorched with great heat, and blasphemed the name of God, who has authority over these plagues; and they did not repent to give him glory.