Revelation 9:19

For their power is in their mouth, and in their tails also; for their tails are like serpents, having heads: and with these likewise they do mischief.

Ephesians 4:14

That we may be no longer children fluctuating and carried about with every wind of doctrine, by the artful insinuations of men, and their crafty methods of deceiving;

Revelation 9:10

And they had tails like scorpions, and there were stings in their tails: and their power was to hurt men five months.

Treasury of Scripture Knowledge

Summary

For their power is in their mouth, and in their tails: for their tails were like unto serpents, and had heads, and with them they do hurt.

Bible References

In their tails

Revelation 9:10
And they had tails like scorpions, and there were stings in their tails: and their power was to hurt men five months.
Ephesians 4:14
That we may be no longer children fluctuating and carried about with every wind of doctrine, by the artful insinuations of men, and their crafty methods of deceiving;