Isaiah 6:10

6:10 Make the hearts of these people calloused;

make their ears deaf and their eyes blind!

Otherwise they might see with their eyes and hear with their ears,

their hearts might understand and they might repent and be healed.”

Deuteronomy 2:30

2:30 But King Sihon of Heshbon was unwilling to allow us to pass near him because the Lord our God had made him obstinate and stubborn so that he might deliver him over to you this very day.

Joshua 11:20

11:20 for the Lord determined to make them obstinate so they would attack Israel. He wanted Israel to annihilate them without mercy, as he had instructed Moses.

John 12:40

12:40 “He has blinded their eyes

and hardened their heart,

so that they would not see with their eyes

and understand with their heart,

and turn to me, and I would heal them.”

Romans 9:18-20

9:18 So then, God has mercy on whom he chooses to have mercy, and he hardens whom he chooses to harden.

9:19 You will say to me then, “Why does he still find fault? For who has ever resisted his will?” 9:20 But who indeed are you – a mere human being – to talk back to God? Does what is molded say to the molder, “Why have you made me like this?”