Mark 8:18

Are your minds so slow to comprehend? You have eyes, do you not see? You have ears, do you not hear?

Mark 4:12

so that, "for all their looking they may not see, and for all their hearing, they may not understand, lest perchance they should turn and be pardoned.

Matthew 13:14-15

And in them is being fulfilled that prophecy of Isaiah which says. "Hearing you will hear and not understand; Seeing you will see and not perceive;

John 12:40

He hath blinded their eyes and make their hearts hard, Lest they should see with their eyes, perceive with their minds, And should turn, and I should heal them.

Acts 28:26-27

"Go to the people and tell them, You will hear and hear, and by no means understand; And will look, and by no means see.

Romans 11:8

According as it is written, God has given them a spirit of slumber, Eyes that they should not see, Ears that they should not hear, unto this day.

2 Peter 1:12

I shall therefore be always ready to remind you of all this, even though you know it, and are firmly founded in the truth which is with you.

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
so that, "for all their looking they may not see, and for all their hearing, they may not understand, lest perchance they should turn and be pardoned.
Matthew 13:14
And in them is being fulfilled that prophecy of Isaiah which says. "Hearing you will hear and not understand; Seeing you will see and not perceive;
John 12:40
He hath blinded their eyes and make their hearts hard, Lest they should see with their eyes, perceive with their minds, And should turn, and I should heal them.
Acts 28:26
"Go to the people and tell them, You will hear and hear, and by no means understand; And will look, and by no means see.
Romans 11:8
According as it is written, God has given them a spirit of slumber, Eyes that they should not see, Ears that they should not hear, unto this day.

Do

2 Peter 1:12
I shall therefore be always ready to remind you of all this, even though you know it, and are firmly founded in the truth which is with you.

General references

Matthew 13:13
"This is why I speak to them in parables, because seeing they do not see, and hearing they do not hear, nor do they understand.
Matthew 15:16
He answered. "Are even you still without understanding?
Matthew 16:10
"Nor the seven loaves for the four thousand, and how many large basketfuls you took up?
Luke 9:45
But they did not understand this saying; it was hidden from them so that they perceived it not, and they were sore afraid to ask him about his saying.