Matthew 13:14

And unto them is fulfilled the prophecy of Isaiah, which saith, By hearing ye shall hear, and shall in no wise understand; And seeing ye shall see, and shall in no wise perceive:

Isaiah 6:9-10

And he said, Go, and tell this people, Hear ye indeed, but understand not; and see ye indeed, but perceive not.

Mark 4:12

that seeing they may see, and not perceive; and hearing they may hear, and not understand; lest haply they should turn again, and it should be forgiven them.

Luke 8:10

And he said, Unto you it is given to know the mysteries of the kingdom of God: but to the rest in parables; that seeing they may not see, and hearing they may not understand.

Ezekiel 12:2

Son of man, thou dwellest in the midst of the rebellious house, that have eyes to see, and see not, that have ears to hear, and hear not; for they are a rebellious house.

John 12:39-40

For this cause they could not believe, for that Isaiah said again,

Acts 28:25-27

And when they agreed not among themselves, they departed after that Paul had spoken one word, Well spake the Holy Spirit through Isaiah the prophet unto your fathers,

Romans 11:8-10

according as it is written, God gave them a spirit of stupor, eyes that they should not see, and ears that they should not hear, unto this very day.

2 Corinthians 3:14

but their minds were hardened: for until this very day at the reading of the old covenant the same veil remaineth, it not being revealed to them that it is done away in Christ.

Treasury of Scripture Knowledge

Summary

And in them is fulfilled the prophecy of Esaias, which saith, By hearing ye shall hear, and shall not understand; and seeing ye shall see, and shall not perceive:

Bible References

The prophecy

Isaiah 6:9
And he said, Go, and tell this people, Hear ye indeed, but understand not; and see ye indeed, but perceive not.
Ezekiel 12:2
Son of man, thou dwellest in the midst of the rebellious house, that have eyes to see, and see not, that have ears to hear, and hear not; for they are a rebellious house.
Mark 4:12
that seeing they may see, and not perceive; and hearing they may hear, and not understand; lest haply they should turn again, and it should be forgiven them.
Luke 8:10
And he said, Unto you it is given to know the mysteries of the kingdom of God: but to the rest in parables; that seeing they may not see, and hearing they may not understand.
John 12:39
For this cause they could not believe, for that Isaiah said again,
Acts 28:25
And when they agreed not among themselves, they departed after that Paul had spoken one word, Well spake the Holy Spirit through Isaiah the prophet unto your fathers,
Romans 11:8
according as it is written, God gave them a spirit of stupor, eyes that they should not see, and ears that they should not hear, unto this very day.
2 Corinthians 3:14
but their minds were hardened: for until this very day at the reading of the old covenant the same veil remaineth, it not being revealed to them that it is done away in Christ.

General references

Leviticus 13:29
And when a man or woman hath a plague upon the head or upon the beard,
Deuteronomy 29:4
but Jehovah hath not given you a heart to know, and eyes to see, and ears to hear, unto this day.
Deuteronomy 32:28
For they are a nation void of counsel, And there is no understanding in them.
Proverbs 20:12
The hearing ear, and the seeing eye, Jehovah hath made even both of them.
Ezekiel 17:2
Son of man, put forth a riddle, and speak a parable unto the house of Israel;
Matthew 24:39
and they knew not until the flood came, and took them all away; so shall be the coming of the Son of man.

American Standard Version Public Domain