James 3:8

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

Romans 3:13

Their throat is an open sepulchre; with their tongues they have practised deceit. The poison of asps is under their lips.

James 3:6

And the tongue is a fire, a world of iniquity! The tongue among our members is that which defileth the whole body, and setteth on fire the wheel of life, and is itself set on fire by hell.

Revelation 12:9

And the great dragon was cast down, the old serpent, called the Devil and Satan, who deceiveth the whole world; he was cast down to the earth, and his angels were cast down with him.

Treasury of Scripture Knowledge

Summary

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

An unruly

General references

Bible References

An unruly

James 3:6
And the tongue is a fire, a world of iniquity! The tongue among our members is that which defileth the whole body, and setteth on fire the wheel of life, and is itself set on fire by hell.

Full

Romans 3:13
Their throat is an open sepulchre; with their tongues they have practised deceit. The poison of asps is under their lips.
Revelation 12:9
And the great dragon was cast down, the old serpent, called the Devil and Satan, who deceiveth the whole world; he was cast down to the earth, and his angels were cast down with him.

General references

Matthew 15:18
But the things which proceed from the mouth come out of the heart; and these defile a man.