Romans 1:31

unintelligent, faithless, without natural affection, implacable, unmerciful;

2 Timothy 3:3

without natural affection, implacable, false accusers, incontinent, fierce, not lovers of those who are good,

2 Kings 18:14-37

and Hezekiah king of Judah sendeth unto the king of Asshur to Lachish, saying, 'I have sinned, turn back from off me; that which thou puttest on me I bear;' and the king of Asshur layeth on Hezekiah king of Judah three hundred talents of silver, and thirty talents of gold,

Proverbs 18:2

A fool delighteth not in understanding, But -- in uncovering his heart.

Isaiah 27:11

In the withering of its branch it is broken off, Women are coming in setting it on fire, For it is not a people of understanding, Therefore pity it not doth its Maker, And its Former doth not favour it.

Isaiah 33:8

Desolated have been highways, Ceased hath he who passeth along the path, He hath broken covenant, He hath despised enemies, He hath not esteemed a man.

Jeremiah 4:22

For my people are foolish, me they have not known, Foolish sons are they, yea, they are not intelligent, Wise are they to do evil, And to do good they have not known.

Matthew 15:16

And Jesus said, 'Are ye also yet without understanding?

Romans 1:20-21

for the invisible things of Him from the creation of the world, by the things made being understood, are plainly seen, both His eternal power and Godhead -- to their being inexcusable;

Romans 3:11

There is none who is understanding, there is none who is seeking after God.

Treasury of Scripture Knowledge

Summary

Without understanding, covenantbreakers, without natural affection, implacable, unmerciful:

General references

Bible References

Without understanding

Romans 1:20
for the invisible things of Him from the creation of the world, by the things made being understood, are plainly seen, both His eternal power and Godhead -- to their being inexcusable;
Romans 3:11
There is none who is understanding, there is none who is seeking after God.
Proverbs 18:2
A fool delighteth not in understanding, But -- in uncovering his heart.
Isaiah 27:11
In the withering of its branch it is broken off, Women are coming in setting it on fire, For it is not a people of understanding, Therefore pity it not doth its Maker, And its Former doth not favour it.
Jeremiah 4:22
For my people are foolish, me they have not known, Foolish sons are they, yea, they are not intelligent, Wise are they to do evil, And to do good they have not known.
Matthew 15:16
And Jesus said, 'Are ye also yet without understanding?

Covenant-breakers

2 Kings 18:14
and Hezekiah king of Judah sendeth unto the king of Asshur to Lachish, saying, 'I have sinned, turn back from off me; that which thou puttest on me I bear;' and the king of Asshur layeth on Hezekiah king of Judah three hundred talents of silver, and thirty talents of gold,
Isaiah 33:8
Desolated have been highways, Ceased hath he who passeth along the path, He hath broken covenant, He hath despised enemies, He hath not esteemed a man.
2 Timothy 3:3
without natural affection, implacable, false accusers, incontinent, fierce, not lovers of those who are good,

General references

Genesis 45:14
And he falleth on the neck of Benjamin his brother, and weepeth, and Benjamin hath wept on his neck;