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.

Matthew 13:14-15

And in them is fulfilled the prophesy of Isaiah, which says: You shall surely hear, and you will not understand; and you shall surely see, and you will not perceive.

Mark 4:12

that they may surely see, and not perceive; and that they may surely hear, and not understand; lest they should turn to me, and their sins should be forgiven them.

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.

Mark 8:17-18

And Jesus perceived it, and said to them: Why do you reason, because you have no bread? Do you not yet perceive, nor understand? Is your heart still hardened?

Luke 24:25

And he said to them: inconsiderate, and slow of heart to believe all things that the prophets have spoken!

Luke 24:45

Then he opened their mind, that they might understand the scriptures,

John 12:38-40

that the word of Isaiah the prophet might be fulfilled, which he spoke: Lord, who has believed our report? and to whom has the arm of the Lord been revealed?

Romans 11:8-10

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.

2 Corinthians 4:4-6

whose unbelieving minds the god of this age has darkened, so that the light of the glorious gospel of Christ, who is the image of God, should not shine to them.

Treasury of Scripture Knowledge

Summary

Saying, Go unto this people, and say, Hearing ye shall hear, and shall not understand; and seeing ye shall see, and not perceive:

Bible References

Hearing

Mark 8:17
And Jesus perceived it, and said to them: Why do you reason, because you have no bread? Do you not yet perceive, nor understand? Is your heart still hardened?
Luke 24:25
And he said to them: inconsiderate, and slow of heart to believe all things that the prophets have spoken!
2 Corinthians 4:4
whose unbelieving minds the god of this age has darkened, so that the light of the glorious gospel of Christ, who is the image of God, should not shine to them.