Matthew 13:15

For this people's heart has become 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.

Hebrews 5:11

Of whom we have many things to say, and hard to explain, seeing you are dull of hearing.

Psalm 119:70

Their heart is as gross as grease; but I delight in your law.

Zechariah 7:11

But they refused to hearken, and shrugged the shoulder, and stopped their ears, that they should not hear.

John 8:43-44

Why do you not understand my speech? even because you cannot hear my word.

2 Timothy 4:4

And they shall turn away their ears from the truth, and shall be turned unto myths.

Isaiah 6:10

Make the heart of this people dull, and make their ears heavy, and shut their eyes; lest they see with their eyes, and hear with their ears, and understand with their heart, and return, and be healed.

Isaiah 29:10-12

For the LORD has poured out upon you the spirit of deep sleep, and has closed your eyes: the prophets and your rulers, the seers has he covered.

Isaiah 44:20

He feeds on ashes: a deceived heart has turned him aside, that he cannot deliver his soul, nor say, Is there not a lie in my right hand?

Isaiah 57:18

I have seen his ways, and will heal him: I will lead him also, and restore comforts unto him and to his mourners.

Jeremiah 3:22

Return, you backsliding children, and I will heal your backslidings. Behold, we come unto you; for you are the LORD our God.

Jeremiah 17:14

Heal me, O LORD, and I shall be healed; save me, and I shall be saved: for you are my praise.

Jeremiah 33:6

Behold, I will bring it health and healing, and I will heal them, and will reveal unto them the abundance of peace and truth.

Hosea 14:4

I will heal their backsliding, I will love them freely: for my anger has turned away from him.

Malachi 4:2

But unto you that fear my name shall the Sun of righteousness arise with healing in his wings; and you shall go forth, and grow up like calves of the stall.

Mark 4:12

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

Acts 3:19

Repent therefore, and be converted, that your sins may be blotted out, when the times of refreshing shall come from the presence of the Lord;

Acts 7:57

Then they cried out with a loud voice, and stopped their ears, and ran upon him with one accord,

2 Thessalonians 2:10-11

And with all deception of unrighteousness in them that perish; because they received not the love of the truth, that they might be saved.

2 Timothy 2:25-26

In meekness instructing those that oppose them; if God perhaps will give them repentance to the acknowledging of the truth;

Hebrews 6:4-6

For it is impossible for those who were once enlightened, and have tasted of the heavenly gift, and were made partakers of the Holy Spirit,

Revelation 22:2

In the midst of the street of it, and on either side of the river, was there the tree of life, which bore twelve manner of fruit, and yielded 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.

Heart

Bible References

Heart

Psalm 119:70
Their heart is as gross as grease; but I delight in your law.

Ears

Zechariah 7:11
But they refused to hearken, and shrugged the shoulder, and stopped their ears, that they should not hear.
John 8:43
Why do you not understand my speech? even because you cannot hear my word.
Acts 7:57
Then they cried out with a loud voice, and stopped their ears, and ran upon him with one accord,
2 Timothy 4:4
And they shall turn away their ears from the truth, and shall be turned unto myths.
Hebrews 5:11
Of whom we have many things to say, and hard to explain, seeing you are dull of hearing.

And should be

Acts 3:19
Repent therefore, and be converted, that your sins may be blotted out, when the times of refreshing shall come from the presence of the Lord;
2 Timothy 2:25
In meekness instructing those that oppose them; if God perhaps will give them repentance to the acknowledging of the truth;
Hebrews 6:4
For it is impossible for those who were once enlightened, and have tasted of the heavenly gift, and were made partakers of the Holy Spirit,

And i

Isaiah 57:18
I have seen his ways, and will heal him: I will lead him also, and restore comforts unto him and to his mourners.
Jeremiah 3:22
Return, you backsliding children, and I will heal your backslidings. Behold, we come unto you; for you are the LORD our God.
Jeremiah 17:14
Heal me, O LORD, and I shall be healed; save me, and I shall be saved: for you are my praise.
Jeremiah 33:6
Behold, I will bring it health and healing, and I will heal them, and will reveal unto them the abundance of peace and truth.
Hosea 14:4
I will heal their backsliding, I will love them freely: for my anger has turned away from him.
Malachi 4:2
But unto you that fear my name shall the Sun of righteousness arise with healing in his wings; and you shall go forth, and grow up like calves of the stall.
Mark 4:12
That seeing they may see, and not perceive; and hearing they may hear, and not understand; lest at any time they should be converted, and their sins should be forgiven them.
Revelation 22:2
In the midst of the street of it, and on either side of the river, was there the tree of life, which bore twelve manner of fruit, and yielded its fruit every month: and the leaves of the tree were for the healing of the nations.

General references

Leviticus 13:29
If a man or woman has a disease upon the head or the beard;
Deuteronomy 29:4
Yet the LORD has not given you a heart to perceive, and eyes to see, and ears to hear, unto this day.
Deuteronomy 32:28
For they are a nation void of counsel, neither is there any understanding in them.
Proverbs 20:12
The hearing ear, and the seeing eye, the LORD has made even both of them.
Matthew 24:39
And knew not until the flood came, and took them all away; so shall also the coming of the Son of man be.