Proverbs 21:29

21:29 A wicked person shows boldness with his face,

but as for the upright, he discerns his ways.

Isaiah 48:4

48:4 I did this because I know how stubborn you are.

Your neck muscles are like iron

and your forehead like bronze.

Ezekiel 3:7-9

3:7 But the house of Israel is unwilling to listen to you, because they are not willing to listen to me, for the whole house of Israel is hard-headed and hard-hearted.

3:8 “I have made your face adamant to match their faces, and your forehead hard to match their foreheads. 3:9 I have made your forehead harder than flint – like diamond! Do not fear them or be terrified of the looks they give you, for they are a rebellious house.”

Zechariah 7:11-12

7:11 “But they refused to pay attention, turning away stubbornly and stopping their ears so they could not hear. 7:12 Indeed, they made their heart as hard as diamond, so that they could not obey the Torah and the other words the Lord who rules over all had sent by his Spirit through the former prophets. Therefore, the Lord who rules over all had poured out great wrath.

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 12:9

12:9 Besides, we have experienced discipline from our earthly fathers and we respected them; shall we not submit ourselves all the more to the Father of spirits and receive life?