Romans 11:8
as it is written: God has given them a spirit of stupor, eyes with which they can not see, and ears with which they can not hear.
Matthew 13:13-14
For this reason I speak to them in parables; because when they see, they see not; and when they hear, they hear not, nor do they understand.
Mark 4:11-12
And he said to them: To you it is given to know the mystery of the kingdom of God; but to those who are without, all things are done in parables;
Luke 8:10
He replied: To you it is given to know the mysteries of the kingdom of God: but to others in parables; that when they see, they may not see, and when they hear, they may not understand.
Acts 28:26
saying: Go to this people and say, You shall surely hear, but you will not understand; and you shall surely see, but you will not perceive.
2 Corinthians 3:14-15
But their minds were blinded: for till this day, in the reading of the old covenant, the same vail remains not taken away, which vail is removed in Christ.