Romans 1:31

fidelity, and natural affection; implacable, and unmerciful:

2 Timothy 3:3

villainous, unnatural, perfidious, defamers, debauchees,

Matthew 15:16

and Jesus said, are ye also yet without understanding?

Romans 1:20-21

for ever since the creation of the world, his eternal power and divinity, things in themselves invisible, are clearly seen, being perceived by the things that are made; so that they are without excuse:

Romans 3:11

there is none that understandeth, there is none that seeketh after God.

Treasury of Scripture Knowledge

Summary

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

Without understanding

Covenant-breakers

Bible References

Without understanding

Romans 1:20
for ever since the creation of the world, his eternal power and divinity, things in themselves invisible, are clearly seen, being perceived by the things that are made; so that they are without excuse:
Romans 3:11
there is none that understandeth, there is none that seeketh after God.
Matthew 15:16
and Jesus said, are ye also yet without understanding?

Covenant-breakers

2 Timothy 3:3
villainous, unnatural, perfidious, defamers, debauchees,