Matthew 12:34

You brood of vipers, how can you speak good when you are evil? For the mouth utters what the heart is full of.

Romans 3:13-14

Their throat is an open grave, they are treacherous with their tongues, the venom of an asp lies under their lips.

James 3:6-8

And the tongue is a fire, the tongue proves a very world of mischief among our members, staining the whole of the body and setting fire to the round circle of existence with a flame fed by hell.

Treasury of Scripture Knowledge

Summary

His mouth is full of cursing and deceit and fraud: under his tongue is mischief and vanity.

And deceit

General references

Bible References

Full

Romans 3:14
Their mouth is full of cursing and bitterness,

And deceit

Romans 3:13
Their throat is an open grave, they are treacherous with their tongues, the venom of an asp lies under their lips.

General references

Romans 3:14
Their mouth is full of cursing and bitterness,