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:

2 Corinthians 11:3

but I fear lest by some means or other, as Eve was beguiled by the subtilly of the serpent, your minds should be corrupted from the simplicity that is due to Christ.

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

They have sharpened their tongues like a serpent; adders' poison is under their lips. Selah.

Sharpened

Adders

Bible References

Sharpened

James 3:6
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.

Like a serpent

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."
2 Corinthians 11:3
but I fear lest by some means or other, as Eve was beguiled by the subtilly of the serpent, your minds should be corrupted from the simplicity that is due to Christ.

Adders

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