Revelation 9:19

For the power of the horses was in their mouths and in their tails; for their tails were like serpents, having heads, and with them they did injury.

Ephesians 4:14

that we may be no longer children, driven about like waves and carried about with every wind of doctrine, by the art of men, and the craftiness of deceitful wiles,

Revelation 9:10

And they had tails like scorpions and stings, and in their tails was their power to injure 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 stings, and in their tails was their power to injure men five months.
Ephesians 4:14
that we may be no longer children, driven about like waves and carried about with every wind of doctrine, by the art of men, and the craftiness of deceitful wiles,