Exodus 8:32

And Pharaoh hardened his heart this time also, and would not let the people go.

Exodus 8:15

And Pharaoh saw that there was respite; and he hardened his heart, and hearkened not to them, as Jehovah had said.

Exodus 4:21

And Jehovah said to Moses, When thou goest to return to Egypt, see that thou do all the wonders before Pharaoh that I have put in thy hand. And I will harden his heart, that he shall not let the people go.

Exodus 7:13-14

And Pharaoh's heart was stubborn, and he hearkened not to them, as Jehovah had said.

Exodus 8:8

And Pharaoh called Moses and Aaron, and said, Intreat Jehovah, that he may take away the frogs from me and from my people; and I will let the people go, that they may sacrifice to Jehovah.

Isaiah 63:17

Why, O Jehovah, hast thou made us to err from thy ways, hast hardened our heart from thy fear? Return for thy servants' sake, the tribes of thine inheritance.

Acts 28:26-27

saying, Go to this people, and say, Hearing ye shall hear and not understand, and seeing ye shall see and not perceive.

Romans 2:5

but, according to thy hardness and impenitent heart, treasurest up to thyself wrath, in the day of wrath and revelation of the righteous judgment of God,

James 1:13-14

Let no man, being tempted, say, I am tempted of God. For God cannot be tempted by evil things, and himself tempts no one.

Treasury of Scripture Knowledge

Summary

And Pharaoh hardened his heart at this time also, neither would he let the people go.

Bible References

General references

Exodus 8:15
And Pharaoh saw that there was respite; and he hardened his heart, and hearkened not to them, as Jehovah had said.
Exodus 4:21
And Jehovah said to Moses, When thou goest to return to Egypt, see that thou do all the wonders before Pharaoh that I have put in thy hand. And I will harden his heart, that he shall not let the people go.
Exodus 7:13
And Pharaoh's heart was stubborn, and he hearkened not to them, as Jehovah had said.
Isaiah 63:17
Why, O Jehovah, hast thou made us to err from thy ways, hast hardened our heart from thy fear? Return for thy servants' sake, the tribes of thine inheritance.
Acts 28:26
saying, Go to this people, and say, Hearing ye shall hear and not understand, and seeing ye shall see and not perceive.
Romans 2:5
but, according to thy hardness and impenitent heart, treasurest up to thyself wrath, in the day of wrath and revelation of the righteous judgment of God,
James 1:13
Let no man, being tempted, say, I am tempted of God. For God cannot be tempted by evil things, and himself tempts no one.