Exodus 9:34

and Pharaoh seeth that the rain hath ceased, and the hail and the voices, and he continueth to sin, and hardeneth his heart, he and his servants;

Exodus 7:14

And Jehovah saith unto Moses, 'The heart of Pharaoh hath been hard, he hath refused to send the people away;

Exodus 4:21

And Jehovah saith unto Moses, 'In thy going to turn back to Egypt, see -- all the wonders which I have put in thy hand -- that thou hast done them before Pharaoh, and I -- I strengthen his heart, and he doth not send the people away;

Exodus 8:15

And Pharaoh seeth that there hath been a respite, and he hath hardened his heart, and hath not hearkened unto them, as Jehovah hath spoken.

2 Chronicles 28:22

And in the time of his distress -- he addeth to trespass against Jehovah, (this king Ahaz),

2 Chronicles 33:23

and hath not been humbled before Jehovah, like the humbling of Manasseh his father, for Amon himself hath multiplied guilt.

2 Chronicles 36:13

and also, against king Nebuchadnezzar he hath rebelled, who had caused him to swear by God, and he hardeneth his neck, and strengtheneth his heart, against turning back unto Jehovah, God of Israel.

Ecclesiastes 8:11

Because sentence hath not been done on an evil work speedily, therefore the heart of the sons of man is full within them to do evil.

Romans 2:4-5

or the riches of His goodness, and forbearance, and long-suffering, dost thou despise? -- not knowing that the goodness of God doth lead thee to reformation!

Treasury of Scripture Knowledge

Summary

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.

General references

Bible References

Saw

Exodus 8:15
And Pharaoh seeth that there hath been a respite, and he hath hardened his heart, and hath not hearkened unto them, as Jehovah hath spoken.
Ecclesiastes 8:11
Because sentence hath not been done on an evil work speedily, therefore the heart of the sons of man is full within them to do evil.

And hardened

Exodus 4:21
And Jehovah saith unto Moses, 'In thy going to turn back to Egypt, see -- all the wonders which I have put in thy hand -- that thou hast done them before Pharaoh, and I -- I strengthen his heart, and he doth not send the people away;
Exodus 7:14
And Jehovah saith unto Moses, 'The heart of Pharaoh hath been hard, he hath refused to send the people away;
2 Chronicles 28:22
And in the time of his distress -- he addeth to trespass against Jehovah, (this king Ahaz),
2 Chronicles 33:23
and hath not been humbled before Jehovah, like the humbling of Manasseh his father, for Amon himself hath multiplied guilt.
2 Chronicles 36:13
and also, against king Nebuchadnezzar he hath rebelled, who had caused him to swear by God, and he hardeneth his neck, and strengtheneth his heart, against turning back unto Jehovah, God of Israel.
Romans 2:4
or the riches of His goodness, and forbearance, and long-suffering, dost thou despise? -- not knowing that the goodness of God doth lead thee to reformation!

General references

Jeremiah 34:11
and they turn afterwards, and cause the men-servants and the maid-servants to return, whom they had sent forth free, and they subdue them for men-servants and for maid-servants.