Matthew 13:14

In them the prophecy of Isaiah is fulfilled, which says, 'By hearing you will hear, and will in no way understand; Seeing you will see, and will in no way perceive:

Isaiah 6:9-10

He said, "Go, and tell this people, 'You hear indeed, but don't understand; and you see indeed, but don't perceive.'

Mark 4:12

that 'seeing they may see, and not perceive; and hearing they may hear, and not understand; lest perhaps they should turn again, and their sins should be forgiven them.'"

Luke 8:10

He said, "To 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, you dwell in the midst of the rebellious house, who have eyes to see, and don't see, who have ears to hear, and don't hear; for they are a rebellious house.

John 12:39-40

For this cause they couldn't believe, for Isaiah said again,

Acts 28:25-27

When they didn't agree among themselves, they departed after Paul had spoken one word, "The Holy Spirit spoke rightly through Isaiah, the prophet, to our 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, to 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 remains, because in Christ it passes 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
He said, "Go, and tell this people, 'You hear indeed, but don't understand; and you see indeed, but don't perceive.'
Ezekiel 12:2
Son of man, you dwell in the midst of the rebellious house, who have eyes to see, and don't see, who have ears to hear, and don't hear; 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 perhaps they should turn again, and their sins should be forgiven them.'"
Luke 8:10
He said, "To 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 couldn't believe, for Isaiah said again,
Acts 28:25
When they didn't agree among themselves, they departed after Paul had spoken one word, "The Holy Spirit spoke rightly through Isaiah, the prophet, to our 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, to 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 remains, because in Christ it passes away.

General references

Leviticus 13:29
"When a man or woman has a plague on the head or on the beard,
Deuteronomy 29:4
but Yahweh has not given you a heart to know, and eyes to see, and ears to hear, to this day.
Deuteronomy 32:28
For they are a nation void of counsel. There is no understanding in them.
Proverbs 20:12
The hearing ear, and the seeing eye, Yahweh has made even both of them.
Ezekiel 17:2
Son of man, put forth a riddle, and speak a parable to the house of Israel;
Matthew 24:39
and they didn't know until the flood came, and took them all away, so will be the coming of the Son of Man.