Revelation 9:10
And they had tails like unto scorpions, and there were stings in their tails: and their power was to hurt men five months.
Cross-references
Revelation 9:3
Parallel
In Revelation 9:3, the locusts receive scorpion-like power; here that power is specifically located in their tails.
Revelation 9:5
Parallel
Revelation 9:5 states the five-month torment limit; here the locusts' tails are the instrument of that torment.
Revelation 9:19
Parallel
Revelation 9:19 says horses' tails are like serpents with heads; here locusts' tails have scorpion stingers. Both use tails as weapons in different plagues.