Matthew 12:34

You brood of vipers! how can you speak good, when you are evil? For out of the abundance of the heart the mouth speaks.

Romans 3:13-14

"Their throat is an open grave; they use their tongues to practice deceit." "The poison of asps is under their lips."

James 3:6-8

And the tongue is a fire, a world of evil among the members of the body. The tongue corrupts our whole person, sets the whole course of our life on fire, and is itself set on fire 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 use their tongues to practice deceit." "The poison of asps is under their lips."

General references

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