Mark 4:12
in order that seeing they may see, and not know; and hearing they may hear, and not understand; lest they may turn, and their sins may he forgiven unto them.
Luke 8:10
And He said; To you it has been given to know the mysteries of the kingdom of God: but to the rest in parables; in order that seeing they may not see, and hearing they may not understand.
Matthew 13:14-15
And the prophecy of Isaiah is fulfilled unto them, saying, By hearing ye shall hear, and may not understand; and seeing you shall see, and may not perceive.
Romans 11:8
as has been written, God has given them the spirit of slumber, eyes that they should not see, and ears that they should not hear, unto this day.
John 12:40
He hath blinded their eyes, and hardened their heart; in order that they may not see with their eyes, nor understand with their heart, and turn, and I shall heal them.
Acts 28:26-27
Go to this people, and say, By hearing ye shall hear, and may not understand; and seeing you shall see, and may not perceive: