Psalm 140:3

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

Psalm 58:4

Their poison is like the poison of a serpent: they are like the deaf adder which stoppeth her ear;

Psalm 57:4

My soul is in the midst of lions; I lie down among them that breathe out flames, the sons of men, whose teeth are spears and arrows, and their tongue a sharp sword.

Genesis 3:13

And Jehovah Elohim said to the woman, What is this thou hast done? And the woman said, The serpent deceived me, and I ate.

Psalm 52:2-3

Thy tongue deviseth mischievous things, like a sharp razor, practising deceit.

Psalm 59:7

Behold, they belch out with their mouth; swords are in their lips: for who say they doth hear?

Psalm 64:3-4

Who have sharpened their tongue like a sword, and have aimed their arrow, a bitter word;

Proverbs 12:18

There is that babbleth like the piercings of a sword; but the tongue of the wise is health.

Proverbs 23:32

at the last it biteth like a serpent, and stingeth like an adder.

Isaiah 59:3-5

For your hands are stained with blood, and your fingers with iniquity; your lips speak lies, your tongue muttereth unrighteousness:

Isaiah 59:13

in transgressing and lying against Jehovah, and departing away from our God, speaking oppression and revolt, conceiving and uttering from the heart words of falsehood.

Jeremiah 9:3

And they bend their tongue, their bow of falsehood, and not for fidelity are they valiant in the land; for they proceed from evil to evil, and they know not me, saith Jehovah.

Jeremiah 9:5

And they act deceitfully every one with his neighbour, and speak not the truth: they teach their tongue to speak falsehood, they weary themselves with perverse dealing.

Matthew 12:34

Offspring of vipers! how can ye speak good things, being wicked? For of the abundance of the heart the mouth speaks.

Romans 3:13-14

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

2 Corinthians 11:3

But I fear lest by any means, as the serpent deceived Eve by his craft, so your thoughts should be corrupted from simplicity as to the Christ.

James 3:6-8

and the tongue is fire, the world of unrighteousness; the tongue is set in our members, the defiler of the whole body, and which sets fire to the course of nature, and is set on fire of hell.

Treasury of Scripture Knowledge

Summary

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

General references

Bible References

Sharpened

Psalm 52:2
Thy tongue deviseth mischievous things, like a sharp razor, practising deceit.
Psalm 57:4
My soul is in the midst of lions; I lie down among them that breathe out flames, the sons of men, whose teeth are spears and arrows, and their tongue a sharp sword.
Psalm 59:7
Behold, they belch out with their mouth; swords are in their lips: for who say they doth hear?
Psalm 64:3
Who have sharpened their tongue like a sword, and have aimed their arrow, a bitter word;
Proverbs 12:18
There is that babbleth like the piercings of a sword; but the tongue of the wise is health.
Isaiah 59:3
For your hands are stained with blood, and your fingers with iniquity; your lips speak lies, your tongue muttereth unrighteousness:
Jeremiah 9:3
And they bend their tongue, their bow of falsehood, and not for fidelity are they valiant in the land; for they proceed from evil to evil, and they know not me, saith Jehovah.
James 3:6
and the tongue is fire, the world of unrighteousness; the tongue is set in our members, the defiler of the whole body, and which sets fire to the course of nature, and is set on fire of hell.

Like a serpent

Genesis 3:13
And Jehovah Elohim said to the woman, What is this thou hast done? And the woman said, The serpent deceived me, and I ate.
Proverbs 23:32
at the last it biteth like a serpent, and stingeth like an adder.
Matthew 12:34
Offspring of vipers! how can ye speak good things, being wicked? For of the abundance of the heart the mouth speaks.
2 Corinthians 11:3
But I fear lest by any means, as the serpent deceived Eve by his craft, so your thoughts should be corrupted from simplicity as to the Christ.

Adders

Psalm 58:4
Their poison is like the poison of a serpent: they are like the deaf adder which stoppeth her ear;
Romans 3:13
their throat is an open sepulchre; with their tongues they have used deceit; asps' poison is under their lips:

General references

Proverbs 25:18
A maul, and a sword, and a sharp arrow, is a man that beareth false witness against his neighbour.