Exodus 8:15

15But when Pharaoh saw that there was a arespite, he bhardened his heart and would not listen to them, as the Lord had said.

1 Samuel 6:6

6Why should you harden your hearts as cthe Egyptians and dPharaoh hardened their hearts? After he had dealt severely with them, edid they not send the people away, and they departed?

Daniel 5:20

20But fwhen his heart was lifted up and his spirit was hardened so that he dealt proudly, ghe was brought down from his kingly throne, and his glory was taken from him.

Acts 19:9

9 hBut when some became stubborn and icontinued in unbelief, speaking evil of jthe Way before the congregation, he withdrew from them and took the disciples with him, reasoning daily in the hall of Tyrannus.
Some manuscripts add from the fifth hour to the tenth (that is, from 11 a.m. to 4 p.m.)

Romans 2:5

5But because of your hard and impenitent heart you are lstoring up mwrath for yourself on the day of wrath when God’s righteous judgment will be revealed.

Hebrews 3:13

13But nexhort one another every day, as long as it is calledtoday,” that none of you may be hardened by othe deceitfulness of sin.

Hebrews 12:25

25See that you do not refuse him who is speaking. For pif they did not escape when they refused him who warned them on earth, much less will we escape if we reject him who warns from heaven.
Copyright information for ESV