Matthew 13:15

For this people's mind is stupefied, their hearing has become dull, and their eyes they have closed; to prevent their ever seeing with their eyes, or hearing with their ears, or understanding with their minds, and turning back, so that I might heal them.'

Acts 28:27

For this people's mind has grown callous, their hearing has become dull, and their eyes they have closed; to prevent their ever seeing with their eyes, or hearing with their ears, or understanding with their minds, and turning back, so that I might cure them.'

2 Peter 2:18

For, while they pour out their frivolous and arrogant talk, they use earthly cravings--every kind of immorality--as a bait to entrap men who are just escaping from the influence of those who live in error.

Revelation 13:5-6

And there was given him a mouth full of boastful and blasphemous words; and liberty of action was granted him for forty-two months.

Treasury of Scripture Knowledge

Summary

They are inclosed in their own fat: with their mouth they speak proudly.

Bible References

They are

Matthew 13:15
For this people's mind is stupefied, their hearing has become dull, and their eyes they have closed; to prevent their ever seeing with their eyes, or hearing with their ears, or understanding with their minds, and turning back, so that I might heal them.'
Acts 28:27
For this people's mind has grown callous, their hearing has become dull, and their eyes they have closed; to prevent their ever seeing with their eyes, or hearing with their ears, or understanding with their minds, and turning back, so that I might cure them.'

With

2 Peter 2:18
For, while they pour out their frivolous and arrogant talk, they use earthly cravings--every kind of immorality--as a bait to entrap men who are just escaping from the influence of those who live in error.
Revelation 13:5
And there was given him a mouth full of boastful and blasphemous words; and liberty of action was granted him for forty-two months.