Matthew 13:15

for this people's heart has become gross, and their ears are dull of hearing, and they have closed their eyes, 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 much to say, and hard to be explained since you are dull of hearing.

Psalm 119:70

Their heart is without feeling, like fat; but I delight in Your Law.

Zechariah 7:11

But they refused to listen, and gave a stubborn shoulder, and made heavy their ears from hearing.

John 8:43-44

Why do you not know My speech? Because you cannot hear My Word.

2 Timothy 4:4

And they will turn away their ears from the truth and will be turned to myths.

Isaiah 6:10

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

Isaiah 29:10-12

For Jehovah has poured out on you the spirit of deep sleep, and has closed your eyes; He has covered the prophets and your heads, the seers.

Isaiah 44:20

He feeds on ashes; a deceived heart has turned him aside, so 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 also lead him, and restore comforts to him and to his mourners.

Jeremiah 3:22

Return, O backsliding sons, and I will heal your backslidings. Behold, we come to You; for You are Jehovah our God.

Jeremiah 17:14

Heal me, O Jehovah, 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 show them the riches of peace and truth.

Hosea 14:4

I will heal their backslidings; I will love them freely; for My anger has turned away from him.

Malachi 4:2

But to you who fear My name, the Sun of Righteousness shall arise, and healing will be on His wings. And you shall go out and frisk like calves of the stall.

Mark 4:12

so 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

Therefore repent and convert so that your sins may be blotted out, when the times of refreshing shall come from the presence of the Lord.

Acts 7:57

And crying out with a loud voice, they stopped their ears and ran on him with one accord.

2 Thessalonians 2:10-11

and with all deceit of unrighteousness in those who perish, because they did not receive the love of the truth, so that they might be saved.

2 Timothy 2:25-26

in meekness instructing those who oppose, if perhaps God 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 its street, and of the river, from here and from there, was the Tree of Life, which bore twelve fruits, each yielding its fruit according to one 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 without feeling, like fat; but I delight in Your Law.

Ears

Zechariah 7:11
But they refused to listen, and gave a stubborn shoulder, and made heavy their ears from hearing.
John 8:43
Why do you not know My speech? Because you cannot hear My Word.
Acts 7:57
And crying out with a loud voice, they stopped their ears and ran on him with one accord.
2 Timothy 4:4
And they will turn away their ears from the truth and will be turned to myths.
Hebrews 5:11
of whom we have much to say, and hard to be explained since you are dull of hearing.

And should be

Acts 3:19
Therefore repent and convert so 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 who oppose, if perhaps God 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 also lead him, and restore comforts to him and to his mourners.
Jeremiah 3:22
Return, O backsliding sons, and I will heal your backslidings. Behold, we come to You; for You are Jehovah our God.
Jeremiah 17:14
Heal me, O Jehovah, 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 show them the riches of peace and truth.
Hosea 14:4
I will heal their backslidings; I will love them freely; for My anger has turned away from him.
Malachi 4:2
But to you who fear My name, the Sun of Righteousness shall arise, and healing will be on His wings. And you shall go out and frisk like calves of the stall.
Mark 4:12
so 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 its street, and of the river, from here and from there, was the Tree of Life, which bore twelve fruits, each yielding its fruit according to one 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 in them a plague on the head or the beard,
Deuteronomy 29:4
Yet Jehovah has not given you a heart to perceive, and eyes to see, and ears to hear, until today.
Deuteronomy 32:28
For they are a nation without wisdom, neither is there any understanding in them.
Proverbs 20:12
The hearing ear and the seeing eye, Jehovah has made both of them.
Matthew 24:39
And they did not know until the flood came and took them all away. So also will be the coming of the Son of Man.