Matthew 12:34

O degenerate race, how can ye, wicked as ye are, utter any thing that is good? for "'tis the overflowing of the heart that the mouth dischargeth."

Romans 3:13-14

their throat is an open sepulchre; with their tongues they have used deceit; the poison of asps is under their lips:

James 3:6-8

the tongue is a brand that sets the world in a combustion: it is but one of the numerous organs of the body, yet it can blast whole assemblies: tipp'd with infernal sulphur it sets the whole train of life in a blaze.

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
whose mouth is full of cursing and bitterness.

And deceit

Romans 3:13
their throat is an open sepulchre; with their tongues they have used deceit; the poison of asps is under their lips:

General references

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