James 3:8

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

Romans 3:13

their throat is an opened tomb, with their tongues they practise deceit, the poison of asps is under their lips.

James 3:6

And the tongue is a fire, the tongue is made a world of wickedness among our members, it defiles the whole body and sets on fire the course of nature and is set on fire by hell.

Revelation 12:9

And the great dragon, the old serpent, who is called the devil and Satan, and who deceives all the world, was cast to the earth, and his angels were cast [to the earth] 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, the tongue is made a world of wickedness among our members, it defiles the whole body and sets on fire the course of nature and is set on fire by hell.

Full

Romans 3:13
their throat is an opened tomb, with their tongues they practise deceit, the poison of asps is under their lips.
Revelation 12:9
And the great dragon, the old serpent, who is called the devil and Satan, and who deceives all the world, was cast to the earth, and his angels were cast [to the earth] with him.

General references

Matthew 15:18
But the things which proceed from the mouth come from the heart, and these defile the man.