Exodus 10:20

²¹The LORD said to Moses, “When you go back into Egypt, see that you do before Pharaoh all the wonders which I have put in your hand, but I will harden his heart and he will not let the people go.

¹⁰Moses and Aaron did all these wonders before Pharaoh, but the LORD hardened Pharaoh’s heart, and he didn’t let the children of Israel go out of his land.

³⁰But Sihon king of Heshbon would not let us pass by him, for the LORD your God hardened his spirit and made his heart obstinate, that he might deliver him into your hand, as it is today.

¹²The LORD hardened the heart of Pharaoh, and he didn’t listen to them, as the LORD had spoken to Moses.

¹³Pharaoh’s heart was hardened, and he didn’t listen to them, as the LORD had spoken.

¹⁴The LORD said to Moses, “Pharaoh’s heart is stubborn. He refuses to let the people go.

¹⁸So then, he has mercy on whom he desires, and he hardens whom he desires.

⁹He said, “Go, and tell this people, ‘You hear indeed, but don’t understand. You see indeed, but don’t perceive.’ ¹⁰Make the heart of this people fat. Make their ears heavy, and shut their eyes; lest they see with their eyes, hear with their ears, understand with their heart, and turn again, and be healed.”

³⁹For this cause they couldn’t believe, for Isaiah said again: ⁴⁰“He has blinded their eyes and he hardened their heart, lest they should see with their eyes, and perceive with their heart, and would turn, and I would heal them.”

¹¹Because of this, God sends them a powerful delusion, that they should believe a lie, ¹²that they all might be judged who didn’t believe the truth, but had pleasure in unrighteousness.