Deuteronomy 29:4

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.”

¹⁸being darkened in their understanding, alienated from the life of God because of the ignorance that is in them, because of the hardening of their hearts.

⁴³Why don’t you understand my speech? Because you can’t hear my word.

¹²The hearing ear, and the seeing eye, the LORD has made even both of them.

¹¹He answered them, “To you it is given to know the mysteries of the Kingdom of Heaven, but it is not given to them. ¹²For whoever has, to him will be given, and he will have abundance; but whoever doesn’t have, from him will be taken away even that which he has. ¹³Therefore I speak to them in parables, because seeing they don’t see, and hearing, they don’t hear, neither do they understand. ¹⁴In them the prophecy of Isaiah is fulfilled, which says, ‘By hearing you will hear, and will in no way understand; Seeing you will see, and will in no way perceive; ¹⁵for this people’s heart has grown callous, their ears are dull of hearing, and they have closed their eyes; or else perhaps they might perceive with their eyes, hear with their ears, understand with their heart, and would turn again, and I would heal them.’

¹⁷O LORD, why do you make us wander from your ways, and harden our heart from your fear? Return for your servants’ sake, the tribes of your inheritance.

¹⁵But to this day, when Moses is read, a veil lies on their heart.

²⁶I will also give you a new heart, and I will put a new spirit within you. I will take away the stony heart out of your flesh, and I will give you a heart of flesh.

⁷What then? That which Israel seeks for, that he didn’t obtain, but the chosen ones obtained it, and the rest were hardened. ⁸According as it is written, “God gave them a spirit of stupor, eyes that they should not see, and ears that they should not hear, to this very day.”

⁹David says, “Let their table be made a snare, a trap, a stumbling block, and a retribution to them. ¹⁰Let their eyes be darkened, that they may not see. Always keep their backs bent.”

¹⁰and with all deception of wickedness for those who are being lost, because they didn’t receive the love of the truth, that they might be saved. 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.