Mark 4:12

that "'They may look and look but not see, and listen and listen but not understand, lest perchance they should return and be pardoned.'"

Luke 8:10

"To you," He replied, "it is granted to know the secrets of the Kingdom of God; but all others are taught by parables, in order that they may see and yet not see, and may hear and yet not understand.

Matthew 13:14-15

And in regard to them the prophecy of Isaiah is receiving signal fulfilment: "'You will hear and hear and by no means understand, and you will look and look and by no means see.

Romans 11:8

And so Scripture says, "God has given them a spirit of drowsiness--eyes to see nothing with and ears to hear nothing with--even until now."

John 12:40

"He has blinded their eyes and made their minds callous, lest they should see with their eyes and perceive with their minds, and should turn, and I should heal them."

Acts 28:26-27

"'Go to this people and tell them, you will hear and hear, and by no means understand; and will look and look, and by no means see.

Treasury of Scripture Knowledge

Summary

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

General references

Bible References

Hear ye

Matthew 13:14
And in regard to them the prophecy of Isaiah is receiving signal fulfilment: "'You will hear and hear and by no means understand, and you will look and look and by no means see.
Mark 4:12
that "'They may look and look but not see, and listen and listen but not understand, lest perchance they should return and be pardoned.'"
Luke 8:10
"To you," He replied, "it is granted to know the secrets of the Kingdom of God; but all others are taught by parables, in order that they may see and yet not see, and may hear and yet not understand.
John 12:40
"He has blinded their eyes and made their minds callous, lest they should see with their eyes and perceive with their minds, and should turn, and I should heal them."
Acts 28:26
"'Go to this people and tell them, you will hear and hear, and by no means understand; and will look and look, and by no means see.
Romans 11:8
And so Scripture says, "God has given them a spirit of drowsiness--eyes to see nothing with and ears to hear nothing with--even until now."

General references

John 8:27
They did not perceive that He was speaking to them of the Father.