Matthew 13:15

for the heart of this people was made gross, and with their ears they heard heavily, and their eyes they closed; lest they should see with their eyes, and hear with their ears, and understand with their heart, and turn, and I should heal them.'

Hebrews 5:11

Concerning Whom we have much to say and difficult to explain, since ye have become dull of hearing.

John 8:43-44

Why do ye not understand My speech? it is because ye cannot hear My word.

2 Timothy 4:4

and will turn away their ears from the truth, and will turn aside to the fables.

Mark 4:12

that, seeing, they may see, and not perceive; and, hearing, they may hear, and not understand; lest haply they should turn, and be forgiven."

Acts 3:19

Repent ye, therefore, and turn, that your sins may be blotted out, that so there may come seasons of refreshing from the presence of the Lord;

Acts 7:57

But, crying out with a loud voice, they closed their ears, and rushed upon him with one accord;

2 Thessalonians 2:10-11

and in all deceit of unrighteousness to those who perish; because they received not the love of the truth, that they might be saved.

2 Timothy 2:25-26

in meekness correcting those opposing themselves, if peradventure God should give them repentance to a full knowledge of the truth,

Hebrews 6:4-6

For as to those who were once enlightened, and tasted of the heavenly gift, and became partakers of the Holy Spirit,

Revelation 22:2

in the midst of its street. And on either side of the river, was a tree of life, producing twelve fruits, yielding its fruit every month; and the leaves of the tree were for the healing of the nations.

Treasury of Scripture Knowledge

Summary

For this people's heart is waxed gross, and their ears are dull of hearing, and their eyes they have closed; lest at any time they should see with their eyes, and hear with their ears, and should understand with their heart, and should be converted, and I should heal them.

General references

Bible References

Ears

John 8:43
Why do ye not understand My speech? it is because ye cannot hear My word.
Acts 7:57
But, crying out with a loud voice, they closed their ears, and rushed upon him with one accord;
2 Timothy 4:4
and will turn away their ears from the truth, and will turn aside to the fables.
Hebrews 5:11
Concerning Whom we have much to say and difficult to explain, since ye have become dull of hearing.

And should be

Acts 3:19
Repent ye, therefore, and turn, that your sins may be blotted out, that so there may come seasons of refreshing from the presence of the Lord;
2 Timothy 2:25
in meekness correcting those opposing themselves, if peradventure God should give them repentance to a full knowledge of the truth,
Hebrews 6:4
For as to those who were once enlightened, and tasted of the heavenly gift, and became partakers of the Holy Spirit,

And i

Mark 4:12
that, seeing, they may see, and not perceive; and, hearing, they may hear, and not understand; lest haply they should turn, and be forgiven."
Revelation 22:2
in the midst of its street. And on either side of the river, was a tree of life, producing twelve fruits, yielding its fruit every month; and the leaves of the tree were for the healing of the nations.

General references

Matthew 24:39
and they knew not until the flood came, and took them all away; so will be the coming of the Son of Man.