Matthew 13:15

for made gross was the heart of this people, and with the ears they heard heavily, and their eyes they did close, lest they might see with the eyes, and with the ears might hear, and with the heart understand, and turn back, and I might heal them.

Hebrews 5:11

concerning whom we have much discourse and of hard explanation to say, since ye have become dull of hearing,

Psalm 119:70

Insensate as fat hath been their heart, I -- in Thy law I have delighted.

Zechariah 7:11

And they refuse to attend, And they give a refractory shoulder, And their ears have made heavy against hearing.

John 8:43-44

wherefore do ye not know my speech? because ye are not able to hear my word.

2 Timothy 4:4

and indeed, from the truth the hearing they shall turn away, and to the fables they shall be turned aside.

Isaiah 6:10

Declare fat the heart of this people, And its ears declare heavy, And its eyes declare dazzled, Lest it see with its eyes, And with its ears hear, and its heart consider, And it hath turned back, and hath health.'

Isaiah 29:10-12

For poured out on you hath Jehovah a spirit of deep sleep, And He closeth your eyes -- the prophets, And your heads -- the seers -- He covered.

Isaiah 44:20

Feeding on ashes, the heart is deceived, It hath turned him aside, And he delivereth not his soul, nor saith: 'Is there not a lie in my right hand?'

Isaiah 57:18

His ways I have seen, and I heal him, yea, I lead him, And recompense comforts to him and to his mourning ones.

Jeremiah 3:22

Turn back, O backsliding sons, I cause your backslidings to cease. -- Behold us, we have come to Thee, For Thou art Jehovah our God.

Jeremiah 17:14

Heal me, O Jehovah, and I am healed, Save me, and I am saved, for my praise art Thou.

Jeremiah 33:6

Lo, I am increasing to it health and cure, And have healed them, and revealed to them The abundance of peace and truth.

Hosea 14:4

I heal their backsliding, I love them freely, For turned back hath Mine anger from him.

Malachi 4:2

And risen to you, ye who fear My name, Hath the sun of righteousness -- and healing in its wings, And ye have gone forth, and have increased as calves of a stall.

Mark 4:12

that seeing they may see and not perceive, and hearing they may hear and not understand, lest they may turn, and the sins may be forgiven them.'

Acts 3:19

reform ye, therefore, and turn back, for your sins being blotted out, that times of refreshing may come from the presence of the Lord,

Acts 7:57

And they, having cried out with a loud voice, stopped their ears, and did rush with one accord upon him,

2 Thessalonians 2:10-11

and in all deceitfulness of the unrighteousness in those perishing, because the love of the truth they did not receive for their being saved,

2 Timothy 2:25-26

in meekness instructing those opposing -- if perhaps God may give to them repentance to an acknowledging of the truth,

Hebrews 6:4-6

for it is impossible for those once enlightened, having tasted also of the heavenly gift, and partakers having became of the Holy Spirit,

Revelation 22:2

in the midst of its broad place, and of the river on this side and on that, is a tree of life, yielding twelve fruits, in each several month rendering its fruits, and the leaves of the tree are for the service 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
Insensate as fat hath been their heart, I -- in Thy law I have delighted.

Ears

Zechariah 7:11
And they refuse to attend, And they give a refractory shoulder, And their ears have made heavy against hearing.
John 8:43
wherefore do ye not know my speech? because ye are not able to hear my word.
Acts 7:57
And they, having cried out with a loud voice, stopped their ears, and did rush with one accord upon him,
2 Timothy 4:4
and indeed, from the truth the hearing they shall turn away, and to the fables they shall be turned aside.
Hebrews 5:11
concerning whom we have much discourse and of hard explanation to say, since ye have become dull of hearing,

And should be

Acts 3:19
reform ye, therefore, and turn back, for your sins being blotted out, that times of refreshing may come from the presence of the Lord,
2 Timothy 2:25
in meekness instructing those opposing -- if perhaps God may give to them repentance to an acknowledging of the truth,
Hebrews 6:4
for it is impossible for those once enlightened, having tasted also of the heavenly gift, and partakers having became of the Holy Spirit,

And i

Isaiah 57:18
His ways I have seen, and I heal him, yea, I lead him, And recompense comforts to him and to his mourning ones.
Jeremiah 3:22
Turn back, O backsliding sons, I cause your backslidings to cease. -- Behold us, we have come to Thee, For Thou art Jehovah our God.
Jeremiah 17:14
Heal me, O Jehovah, and I am healed, Save me, and I am saved, for my praise art Thou.
Jeremiah 33:6
Lo, I am increasing to it health and cure, And have healed them, and revealed to them The abundance of peace and truth.
Hosea 14:4
I heal their backsliding, I love them freely, For turned back hath Mine anger from him.
Malachi 4:2
And risen to you, ye who fear My name, Hath the sun of righteousness -- and healing in its wings, And ye have gone forth, and have increased as calves of a stall.
Mark 4:12
that seeing they may see and not perceive, and hearing they may hear and not understand, lest they may turn, and the sins may be forgiven them.'
Revelation 22:2
in the midst of its broad place, and of the river on this side and on that, is a tree of life, yielding twelve fruits, in each several month rendering its fruits, and the leaves of the tree are for the service of the nations;

General references

Leviticus 13:29
'And when a man (or a woman) hath in him a plague in the head or in the beard,
Deuteronomy 29:4
and Jehovah hath not given to you a heart to know, and eyes to see, and ears to hear, till this day,
Deuteronomy 32:28
For a nation lost to counsels are they, And there is no understanding in them.
Proverbs 20:12
A hearing ear, and a seeing eye, Jehovah hath made even both of them.
Matthew 24:39
and they did not know till the flood came and took all away; so shall be also the presence of the Son of Man.