Revelation 9:19

For their powers are in their mouth, and in their tails; for their tails are like serpents, having heads, and with them they do hurt.

Ephesians 4:14

that we should be no longer infants, floating on the waves, and carried about with every wind of novel doctrine, by the juggling of men, by their craftiness after the delusive wiles of error;

Revelation 9:10

And they had tails like scorpions, and there were stings in their tails: and they had power 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 they had power to hurt men five months.
Ephesians 4:14
that we should be no longer infants, floating on the waves, and carried about with every wind of novel doctrine, by the juggling of men, by their craftiness after the delusive wiles of error;