Mark 4:12
that seeing they may see, and not perceive, and hearing they may hear, and not understand, lest at any time they should turn, and be forgiven.
Luke 8:10
And he said, It is given to you to know the mysteries of the kingdom of God, but to others in parables; that seeing they may not see, and hearing they may not understand.
Matthew 13:14-15
And in them is fulfilled the prophecy of Isaiah, which says; Hearing you shall hear and not understand, and seeing you shall see and not perceive;
John 12:40
He has blinded their eyes, and hardened their hearts, that they should not see with their eyes and understand with their hearts, and be converted, and I should cure them.
Acts 28:26-27
saying, Go to this people and say, Hearing you shall hear and not understand, and seeing you shall see and not perceive;