Matthew 13:14

And, again is being fulfilled in them, the prophecy of Isaiah, which saith, - They shall, surely hear, and yet will not understand, and, surely see, and yet not perceive;

Isaiah 6:9-10

Then said be - Go and say unto this people, - Hear on but do not discern, See on but do not perceive:

Mark 4:12

They may surely look and yet not see, and surely hear and yet not understand, lest once they should return and it be forgiven them.

Luke 8:10

And, he, said - Unto you, hath it been given, to get to know the sacred secrets of the kingdom of God; but, unto the rest, in parables, - in order that, seeing, they may not see, and, hearing, they may not understand.

Ezekiel 12:2

Son of man. In the midst of a perverse house, dost thou dwell, - Who have eyes to see - and have not seen. Ears have they to hear - and have no heard, For a perverse house, they are.

John 12:39-40

On this account, they could not believe, because, again, said Isaiah -

Acts 28:25-27

and, not being, agreed, among themselves, they began to leave, - Paul having said one thing - Well, did, the Holy Spirit, speak through Isaiah the prophet, unto your fathers,

Romans 11:8-10

Even as it is written - God hath given unto them a spirit of stupor, - eyes not to see, and ears not to hear, - until this very day;

2 Corinthians 3:14

But their thoughts were turned into stone: for, until this very day, the same veil, upon the reading of the old covenant, abideth, not to be removed, because, in Christ, it is to be done away;

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
Then said be - Go and say unto this people, - Hear on but do not discern, See on but do not perceive:
Ezekiel 12:2
Son of man. In the midst of a perverse house, dost thou dwell, - Who have eyes to see - and have not seen. Ears have they to hear - and have no heard, For a perverse house, they are.
Mark 4:12
They may surely look and yet not see, and surely hear and yet not understand, lest once they should return and it be forgiven them.
Luke 8:10
And, he, said - Unto you, hath it been given, to get to know the sacred secrets of the kingdom of God; but, unto the rest, in parables, - in order that, seeing, they may not see, and, hearing, they may not understand.
John 12:39
On this account, they could not believe, because, again, said Isaiah -
Acts 28:25
and, not being, agreed, among themselves, they began to leave, - Paul having said one thing - Well, did, the Holy Spirit, speak through Isaiah the prophet, unto your fathers,
Romans 11:8
Even as it is written - God hath given unto them a spirit of stupor, - eyes not to see, and ears not to hear, - until this very day;
2 Corinthians 3:14
But their thoughts were turned into stone: for, until this very day, the same veil, upon the reading of the old covenant, abideth, not to be removed, because, in Christ, it is to be done away;

General references

Leviticus 13:29
And, when there cometh to be in, any man or woman, a spot, - in the head or in the beard,
Deuteronomy 29:4
yet hath Yahweh not given onto you a heart to know, or eyes to see or ears to hear, - until this day.
Deuteronomy 32:28
For a nation of vanished sagacity, they are, - And there is in them no understanding.
Proverbs 20:12
The hearing ear, and the seeing eye, Yahweh hath made them, both.
Ezekiel 17:2
Son of man Put thou forth a riddle And speak thou a parable,- Unto the house of Israel:
Matthew 24:39
And they observed not, until the flood came and took away all together, so, will be, the presence of the Son of Man.