Revelation 9:19

For the power of the horses is in their mouth and in their tails: for their tails are like serpents, having heads, and with them they injure.

Isaiah 9:15

the ancient and honourable, he is the head; and the prophet that teacheth lies, he is the tail.

Ephesians 4:14

in order that we may be no longer babes, tossed and carried about by every wind of that teaching which is in the sleight of men, in unprincipled cunning with a view to systematized error;

Revelation 9:10

and they have tails like scorpions, and stings; and their power was in their tails 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 have tails like scorpions, and stings; and their power was in their tails to hurt men five months.
Isaiah 9:15
the ancient and honourable, he is the head; and the prophet that teacheth lies, he is the tail.
Ephesians 4:14
in order that we may be no longer babes, tossed and carried about by every wind of that teaching which is in the sleight of men, in unprincipled cunning with a view to systematized error;