Psalm 140:3

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

Cross References (ranked by relevance)

Psalm 58:4

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

2 Corinthians 11:3

But I fear, lest by any means, as the serpent beguiled Eve through his subtilty, so your minds should be corrupted from the simplicity that is in Christ.

Proverbs 23:32

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

Jeremiah 9:5

And they will deceive every one his neighbour, and will not speak the truth: they have taught their tongue to speak lies, and weary themselves to commit iniquity.

Jeremiah 9:3

And they bend their tongues like their bow for lies: but they are not valiant for the truth upon the earth; for they proceed from evil to evil, and they know not me, saith the LORD.

Psalm 57:4

My soul is among lions: and I lie even among them that are set on fire, even the sons of men, whose teeth are spears and arrows, and their tongue a sharp sword.

Matthew 12:34

O generation of vipers, how can ye, being evil, speak good things? for out of the abundance of the heart the mouth speaketh.

Isaiah 59:13

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

Genesis 3:13

And the LORD God said unto the woman, What is this that thou hast done? And the woman said, The serpent beguiled me, and I did eat.

Proverbs 12:18

There is that speaketh like the piercings of a sword: but the tongue of the wise is health.

Psalm 59:7

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