Matthew 13:14

and fulfilled on them is the prophecy of Isaiah, that saith, With hearing ye shall hear, and ye shall not understand, and seeing ye shall see, and ye shall not perceive,

Isaiah 6:9-10

And He saith, 'Go, and thou hast said to this people, Hear ye -- to hear, and ye do not understand, And see ye -- to see, and ye do not know.

Mark 4:12

that seeing they may see and not perceive, and hearing they may hear and not understand, lest they may turn, and the sins may be forgiven them.'

Luke 8:10

And he said, 'To you it hath been given to know the secrets of the reign of God, and to the rest in similes; that seeing they may not see, and hearing they may not understand.

Ezekiel 12:2

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

John 12:39-40

Because of this they were not able to believe, that again Isaiah said,

Acts 28:25-27

And not being agreed with one another, they were going away, Paul having spoken one word -- 'Well did the Holy Spirit speak through Isaiah the prophet unto our fathers,

Romans 11:8-10

according as it hath been written, 'God gave to them a spirit of deep sleep, eyes not to see, and ears not to hear,' -- unto this very day,

2 Corinthians 3:14

but their minds were hardened, for unto this day the same vail at the reading of the Old Covenant doth remain unwithdrawn -- which in Christ is being made useless --

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 saith, 'Go, and thou hast said to this people, Hear ye -- to hear, and ye do not understand, And see ye -- to see, and ye do not know.
Ezekiel 12:2
Son of man, in the midst of the rebellious house thou art dwelling, that have eyes to see, and they have not seen; ears they have to hear, and they have not heard; for a rebellious house are they.
Mark 4:12
that seeing they may see and not perceive, and hearing they may hear and not understand, lest they may turn, and the sins may be forgiven them.'
Luke 8:10
And he said, 'To you it hath been given to know the secrets of the reign of God, and to the rest in similes; that seeing they may not see, and hearing they may not understand.
John 12:39
Because of this they were not able to believe, that again Isaiah said,
Acts 28:25
And not being agreed with one another, they were going away, Paul having spoken one word -- 'Well did the Holy Spirit speak through Isaiah the prophet unto our fathers,
Romans 11:8
according as it hath been written, 'God gave to them a spirit of deep sleep, eyes not to see, and ears not to hear,' -- unto this very day,
2 Corinthians 3:14
but their minds were hardened, for unto this day the same vail at the reading of the Old Covenant doth remain unwithdrawn -- which in Christ is being made useless --

General references

Leviticus 13:29
'And when a man (or a woman) hath in him a plague in the head or in the beard,
Deuteronomy 29:4
and Jehovah hath not given to you a heart to know, and eyes to see, and ears to hear, till this day,
Deuteronomy 32:28
For a nation lost to counsels are they, And there is no understanding in them.
Proverbs 20:12
A hearing ear, and a seeing eye, Jehovah hath made even both of them.
Ezekiel 17:2
'Son of man, put forth a riddle, and use a simile unto the house of Israel,
Matthew 24:39
and they did not know till the flood came and took all away; so shall be also the presence of the Son of Man.