1 Samuel 6:6
Wherefore then do ye harden your hearts, as the Egyptians and Pharaoh hardened their hearts? When he had wrought wonderfully among them, did they not let the people go, and they departed?
Exodus 7:13
And Pharaoh's heart was hardened, and he hearkened not unto them; as Jehovah had spoken.
Exodus 8:15
But when Pharaoh saw that there was respite, he hardened his heart, and hearkened not unto them, as Jehovah had spoken.
Exodus 14:17
And I, behold, I will harden the hearts of the Egyptians, and they shall go in after them: and I will get me honor upon Pharaoh, and upon all his host, upon his chariots, and upon his horsemen.
Exodus 9:34
And when Pharaoh saw that the rain and the hail and the thunders were ceased, he sinned yet more, and hardened his heart, he and his servants.
Exodus 8:32
And Pharaoh hardened his heart this time also, and he did not let the people go.
Exodus 9:16
but in very deed for this cause have I made thee to stand, to show thee my power, and that my name may be declared throughout all the earth.
Exodus 10:3
And Moses and Aaron went in unto Pharaoh, and said unto him, Thus saith Jehovah, the God of the Hebrews, How long wilt thou refuse to humble thyself before me? let my people go, that they may serve me.
Exodus 12:31-33
And he called for Moses and Aaron by night, and said, Rise up, get you forth from among my people, both ye and the children of Israel; and go, serve Jehovah, as ye have said.
Exodus 14:23
And the Egyptians pursued, and went in after them into the midst of the sea, all Pharaoh's horses, his chariots, and his horsemen.
Exodus 15:14-16
The peoples have heard, they tremble: Pangs have taken hold on the inhabitants of Philistia.
Job 9:4
He is wise in heart, and mighty in strength: Who hath hardened himself against him, and prospered?-
Psalm 95:8
Harden not your heart, as at Meribah, As in the day of Massah in the wilderness;
Romans 2:5
but after thy hardness and impenitent heart treasurest up for thyself wrath in the day of wrath and revelation of the righteous judgment of God;
Hebrews 3:13
but exhort one another day by day, so long as it is called To-day; lest any one of you be hardened by the deceitfulness of sin: