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.
Matthew 13:13-14
Therefore I speak to them in parables; because seeing they see not, and hearing they hear not, neither do they understand.
Mark 4:11-12
And He said to them, To you it has been given the mystery of the kingdom of God: but to them who are without, all things are in parables:
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.
Acts 28:26
Go to this people, and say, By hearing ye shall hear, and may not understand; and seeing you shall see, and may not perceive:
2 Corinthians 3:14-15
But their minds were darkened. For until this day the same veil remains in the reading of the old covenant, remains, not lifted; because it is done away in Christ;