Mark 8:18

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

Mark 4:12

that they may surely see, and not perceive; and that they may surely hear, and not understand; lest they should turn to me, and their sins should be forgiven them.

Matthew 13:14-15

And in them is fulfilled the prophesy of Isaiah, which says: You shall surely hear, and you will not understand; and you shall surely see, and you will not perceive.

John 12:40

He has blinded their eyes, and hardened their heart, lest they should see with their eyes, and understand with their heart, and should turn, and I should give them health.

Acts 28:26-27

saying: Go to this people and say, You shall surely hear, but you will not understand; and you shall surely see, but you will not perceive.

Romans 11:8

as it is written: God has given them a spirit of stupor, eyes with which they can not see, and ears with which they can not hear.

2 Peter 1:12

Wherefore, I will not neglect to remind you always of these things, though you 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 they may surely see, and not perceive; and that they may surely hear, and not understand; lest they should turn to me, and their sins should be forgiven them.
Matthew 13:14
And in them is fulfilled the prophesy of Isaiah, which says: You shall surely hear, and you will not understand; and you shall surely see, and you will not perceive.
John 12:40
He has blinded their eyes, and hardened their heart, lest they should see with their eyes, and understand with their heart, and should turn, and I should give them health.
Acts 28:26
saying: Go to this people and say, You shall surely hear, but you will not understand; and you shall surely see, but you will not perceive.
Romans 11:8
as it is written: God has given them a spirit of stupor, eyes with which they can not see, and ears with which they can not hear.

Do

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

General references

Matthew 13:13
For this reason I speak to them in parables; because when they see, they see not; and when they hear, they hear not, nor do they understand.
Matthew 15:16
Jesus replied: Are you also yet without understanding?
Matthew 16:10
Nor the seven loaves of the four thousand, and how many baskets you took up?
Luke 9:45
But they did not understand this saying, and it was concealed from them, that they might not understand it; and they were afraid to ask him about this saying.