James 3:8

but no man can tame the tongue. It is a restless evil, full of deadly poison.

Psalm 140:3

They make their tongues
as sharp as a snake’s bite;
viper’s venom is under their lips.Selah

Romans 3:13

Their throat is an open grave;
they deceive with their tongues.
Vipers’ venom is under their lips.

Ecclesiastes 10:11

If the snake bites before it is charmed,
then there is no advantage for the charmer.

Deuteronomy 32:33

Their wine is serpents’ venom,
the deadly poison of cobras.

Psalm 55:21

His buttery words are smooth,
but war is in his heart.
His words are softer than oil,
but they are drawn swords.

Psalm 57:4

I am surrounded by lions;
I lie down with those who devour men.
Their teeth are spears and arrows;
their tongues are sharp swords.

Psalm 58:4

They have venom like the venom of a snake,
like the deaf cobra that stops up its ears,

Psalm 59:7

Look, they spew from their mouths—
sharp words from their lips.
“For who,” they say, “will hear?”

Psalm 64:3-4

who sharpen their tongues like swords
and aim bitter words like arrows,

James 3:6

And the tongue is a fire. The tongue, a world of unrighteousness, is placed among the parts of our bodies. It pollutes the whole body, sets the course of life on fire, and is set on fire by hell.

Revelation 12:9

So the great dragon was thrown out—the ancient serpent, who is called the Devil and Satan, the one who deceives the whole world. He was thrown to earth, and his angels with him.

Treasury of Scripture Knowledge

Summary

But the tongue can no man tame; it is an unruly evil, full of deadly poison.

General references

Bible References

An unruly

James 3:6
And the tongue is a fire. The tongue, a world of unrighteousness, is placed among the parts of our bodies. It pollutes the whole body, sets the course of life on fire, and is set on fire by hell.
Psalm 55:21
His buttery words are smooth,
but war is in his heart.
His words are softer than oil,
but they are drawn swords.
Psalm 57:4
I am surrounded by lions;
I lie down with those who devour men.
Their teeth are spears and arrows;
their tongues are sharp swords.
Psalm 59:7
Look, they spew from their mouths—
sharp words from their lips.
“For who,” they say, “will hear?”
Psalm 64:3
who sharpen their tongues like swords
and aim bitter words like arrows,

Full

Deuteronomy 32:33
Their wine is serpents’ venom,
the deadly poison of cobras.
Psalm 58:4
They have venom like the venom of a snake,
like the deaf cobra that stops up its ears,
Psalm 140:3
They make their tongues
as sharp as a snake’s bite;
viper’s venom is under their lips.Selah
Ecclesiastes 10:11
If the snake bites before it is charmed,
then there is no advantage for the charmer.
Romans 3:13
Their throat is an open grave;
they deceive with their tongues.
Vipers’ venom is under their lips.
Revelation 12:9
So the great dragon was thrown out—the ancient serpent, who is called the Devil and Satan, the one who deceives the whole world. He was thrown to earth, and his angels with him.

General references

Matthew 15:18
But what comes out of the mouth comes from the heart, and this defiles a man.

Holman Christian Standard Bible®, Copyright © 1999, 2000, 2002, 2003, 2009 by Holman Bible Publishers.