Matthew 13:14

And for them the words of Isaiah have come true, Though you give ear, you will not get knowledge; and seeing, you will see, but the sense will not be clear to you:

Isaiah 6:9-10

And he said, Go, and say to this people, You will go on hearing, but learning nothing; you will go on seeing, but without getting wiser.

Mark 4:12

So that seeing they may see, and it will not be clear to them; and hearing it, they will not get the sense; for fear that they may be turned again to me and have forgiveness.

Luke 8:10

And he said, To you is given knowledge of the secrets of the kingdom of God; but to the others, they are given in stories, so that seeing, they may not see, and though they give hearing, the sense will not be clear to them.

Ezekiel 12:2

Son of man, you are living among an uncontrolled people, who have eyes to see but see not, and ears for hearing but they do not give ear; for they are an uncontrolled people.

John 12:39-40

For this reason they were unable to have belief, because Isaiah said again,

Acts 28:25-27

And they went away, for there was a division among them after Paul had said this one thing: Well did the Holy Spirit say by the prophet Isaiah to your fathers,

Romans 11:8-10

As it was said in the holy Writings, God gave them a spirit of sleep, eyes which might not see, and ears which have no hearing, to this day.

2 Corinthians 3:14

But their minds were made hard: for to this very day at the reading of the old agreement the same veil is still unlifted; though it is taken 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 say to this people, You will go on hearing, but learning nothing; you will go on seeing, but without getting wiser.
Ezekiel 12:2
Son of man, you are living among an uncontrolled people, who have eyes to see but see not, and ears for hearing but they do not give ear; for they are an uncontrolled people.
Mark 4:12
So that seeing they may see, and it will not be clear to them; and hearing it, they will not get the sense; for fear that they may be turned again to me and have forgiveness.
Luke 8:10
And he said, To you is given knowledge of the secrets of the kingdom of God; but to the others, they are given in stories, so that seeing, they may not see, and though they give hearing, the sense will not be clear to them.
John 12:39
For this reason they were unable to have belief, because Isaiah said again,
Acts 28:25
And they went away, for there was a division among them after Paul had said this one thing: Well did the Holy Spirit say by the prophet Isaiah to your fathers,
Romans 11:8
As it was said in the holy Writings, God gave them a spirit of sleep, eyes which might not see, and ears which have no hearing, to this day.
2 Corinthians 3:14
But their minds were made hard: for to this very day at the reading of the old agreement the same veil is still unlifted; though it is taken away in Christ.

General references

Leviticus 13:29
And when a man or a woman has a disease on the head, or in the hair of the chin,
Deuteronomy 29:4
But even to this day the Lord has not given you a mind open to knowledge, or seeing eyes or hearing ears.
Deuteronomy 32:28
For they are a nation without wisdom; there is no sense in them.
Proverbs 20:12
The hearing ear and the seeing eye are equally the Lord's work.
Ezekiel 17:2
Son of man, give out a dark saying, and make a comparison for the children of Israel,
Matthew 24:39
And they had no care till the waters came and took them all away; so will be the coming of the Son of man.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain