Mark 8:18

Having eyes, do ye not see? and having ears, do ye not hear? and do ye not remember?

Mark 4:12

That seeing they may see, yet not perceive; and hearing may hear, yet not understand; lest at any time they should be converted, and their sins be forgiven them.

Matthew 13:14-15

And in them is fulfilled the prophecy of Isaiah, which saith, With the hearing ye shall hear, and not understand; and seeing ye shall see, and in no wise perceive:

John 12:40

"He hath blinded their eyes, and hardened their hearts; lest they should see with their eyes, and understand with the heart, and be converted, and I should heal them."

Acts 28:26-27

saying, Go to this people, and say, "In hearing ye shall hear, and shall not understand; and seeing ye shall see, yet in nowise perceive.

Romans 11:8

as it is written, "God hath given them the spirit of slumber, eyes that they should not see, and ears that they should not hear; unto this present day."

2 Peter 1:12

Wherefore I will not be negligent continually to remind you of these things, though ye know them, and are established in the present truth.

Treasury of Scripture Knowledge

Summary

Having eyes, see ye not? and having ears, hear ye not? and do ye not remember?

Bible References

See

Mark 4:12
That seeing they may see, yet not perceive; and hearing may hear, yet not understand; lest at any time they should be converted, and their sins be forgiven them.
Matthew 13:14
And in them is fulfilled the prophecy of Isaiah, which saith, With the hearing ye shall hear, and not understand; and seeing ye shall see, and in no wise perceive:
John 12:40
"He hath blinded their eyes, and hardened their hearts; lest they should see with their eyes, and understand with the heart, and be converted, and I should heal them."
Acts 28:26
saying, Go to this people, and say, "In hearing ye shall hear, and shall not understand; and seeing ye shall see, yet in nowise perceive.
Romans 11:8
as it is written, "God hath given them the spirit of slumber, eyes that they should not see, and ears that they should not hear; unto this present day."

Do

2 Peter 1:12
Wherefore I will not be negligent continually to remind you of these things, though ye know them, and are established in the present truth.

General references

Matthew 13:13
Therefore I speak to them in parables: that seeing, they may not see; and hearing, they may not hear nor understand.
Matthew 15:16
And Jesus said, Are ye also to this time destitute of intelligence?
Matthew 16:10
Nor the seven loaves among the four thousand, and how many baskets ye took up?
Luke 9:45
And they understood not that declaration, and it was hid from them, that they should not comprehend its meaning: and they were afraid to ask him concerning that saying.