Exodus 8:15

8:15 But when Pharaoh saw that there was relief, he hardened his heart and did not listen to them, just as the Lord had predicted.

Exodus 8:32

8:32 But Pharaoh hardened his heart this time also and did not release the people.

Exodus 9:17

9:17 You are still exalting yourself against my people by not releasing them.

Nehemiah 9:29

9:29 And you solemnly admonished them in order to return them to your law, but they behaved presumptuously and did not obey your commandments. They sinned against your ordinances – those by which an individual, if he obeys them, will live. They boldly turned from you; they rebelled and did not obey.

Romans 2:4-5

2:4 Or do you have contempt for the wealth of his kindness, forbearance, and patience, and yet do not know that God’s kindness leads you to repentance? 2:5 But because of your stubbornness and your unrepentant heart, you are storing up wrath for yourselves in the day of wrath, when God’s righteous judgment is revealed!

Hebrews 3:8

3:8 “Do not harden your hearts as in the rebellion, in the day of testing in the wilderness.

Hebrews 3:13

3:13 But exhort one another each day, as long as it is called “Today,” that none of you may become hardened by sin’s deception.