Revelation 9:19

For the power of the horses is in their mouth, and in their tails; for their tails are like to serpents, having heads; and with them they do hurt.

Ephesians 4:14

that we may no longer be children, tossed to and fro and borne about by every wind of teaching, through the dishonest tricks of men, and their cunning in the wily arts of error;

Revelation 9:10

And they have tails like scorpions, and stings; and in their tails is their 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 have tails like scorpions, and stings; and in their tails is their power to hurt men five months.
Ephesians 4:14
that we may no longer be children, tossed to and fro and borne about by every wind of teaching, through the dishonest tricks of men, and their cunning in the wily arts of error;