Matthew 13:15

Because the heart of this people is waxed gross, and they heard heavily with their ears, and closed their eyes; lest they may see with their eyes, and hear with their ears, and understand with their hearts, and turn, and I shall heal them.

Hebrews 5:11

Concerning whom there is much word to us, and difficult to speak, since you are dull of hearing.

John 8:43-44

Wherefore do you not understand my speech? Because you are not able to hear my word.

2 Timothy 4:4

and they will indeed turn their hearing from the truth, and be turned unto fables.

Mark 4:12

in order that seeing they may see, and not know; and hearing they may hear, and not understand; lest they may turn, and their sins may he forgiven unto them.

Acts 3:19

Repent, therefore, and turn, that your sins may be blotted out, in order that seasons of soul-renewing may come from the presence of the Lord,

Acts 7:57

And crying out with a loud voice, they stopped their ears, and unanimously rushed on him,

2 Thessalonians 2:10-11

and in all the deception of unrighteousness to those who perish; because they did not receive the divine love of the truth, that they might be saved.

2 Timothy 2:25-26

in meekness correcting the adversaries; if peradventure God may grant unto them repentance into the perfect knowledge of the truth,

Hebrews 6:4-6

For it is impossible that those having been once enlightened, and tasted the heavenly gift, and have been made partakers of the Holy Ghost,

Revelation 22:2

In the midst of the street of it, and on either side of the river, is the tree of life, producing twelve manner of fruits, yielding its fruit every month: and the leaves of the tree are 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
Wherefore do you not understand my speech? Because you are not able to hear my word.
Acts 7:57
And crying out with a loud voice, they stopped their ears, and unanimously rushed on him,
2 Timothy 4:4
and they will indeed turn their hearing from the truth, and be turned unto fables.
Hebrews 5:11
Concerning whom there is much word to us, and difficult to speak, since you are dull of hearing.

And should be

Acts 3:19
Repent, therefore, and turn, that your sins may be blotted out, in order that seasons of soul-renewing may come from the presence of the Lord,
2 Timothy 2:25
in meekness correcting the adversaries; if peradventure God may grant unto them repentance into the perfect knowledge of the truth,
Hebrews 6:4
For it is impossible that those having been once enlightened, and tasted the heavenly gift, and have been made partakers of the Holy Ghost,

And i

Mark 4:12
in order that seeing they may see, and not know; and hearing they may hear, and not understand; lest they may turn, and their sins may he forgiven unto them.
Revelation 22:2
In the midst of the street of it, and on either side of the river, is the tree of life, producing twelve manner of fruits, yielding its fruit every month: and the leaves of the tree are for the healing of the nations.

General references

Matthew 24:39
and they did not know until the flood came, and took them all away; so shall be the coming of the Son of man.