Mark 5:9

Then He asked [the evil spirit], "What is your name?" And he answered Him, "My name is 'Legion,' [Note: This word means a number consisting of between 5,000 and 6,000], for there are many of us [i.e., evil spirits]."

Matthew 26:53

Or, do you think that I cannot appeal to my Father and He will immediately send me more than twelve legions of angels [i.e., Jesus could have called about 72,000 angels to minister to Him. See Matt. 4:11]?

Luke 8:30

Then Jesus asked him, "What is your name?" And he answered, " [My name is] 'Legion'" [Note: This word means a number consisting of between 5,000 and 6,000], for many evil spirits had entered the man.

Matthew 12:45

Then it goes and takes with it seven other spirits, more evil than itself, and they reenter [the body] and [begin to] live there, so that the latter state of that person becomes worse than the former [state]. It will be the same way with the people of this evil generation."

Mark 5:15

And when people came to Jesus, they saw the man who had been dominated by 5,000 to 6,000 evil spirits sitting down with his clothes on and perfectly sane, and they were afraid.

Luke 11:21-26

When a fully armed strong man guards his own courtyard [i.e., homestead], his possessions are safe.

Treasury of Scripture Knowledge

Summary

And he asked him, What is thy name? And he answered, saying, My name is Legion: for we are many.

General references

Bible References

What

Luke 8:30
Then Jesus asked him, "What is your name?" And he answered, " [My name is] 'Legion'" [Note: This word means a number consisting of between 5,000 and 6,000], for many evil spirits had entered the man.
Luke 11:21
When a fully armed strong man guards his own courtyard [i.e., homestead], his possessions are safe.

General references

Acts 19:15
[On one occasion] the evil spirit replied, "I know Jesus and I know Paul, but who are you?"