Luke 18:3

And there was a widow in that city, who came to him, saying, Do me justice of my adversary.

Luke 18:7-8

and will not God do justice for his elect that cry to Him day and night, though He bear long with them.

Romans 13:3-4

For rulers are not a terror to good works, but to the evil. Wouldest thou then not be afraid of the civil power? do what is good, and thou shalt have praise from it:

Treasury of Scripture Knowledge

Summary

And there was a widow in that city; and she came unto him, saying, Avenge me of mine adversary.

Bible References

Avenge

Luke 18:7
and will not God do justice for his elect that cry to Him day and night, though He bear long with them.
Romans 13:3
For rulers are not a terror to good works, but to the evil. Wouldest thou then not be afraid of the civil power? do what is good, and thou shalt have praise from it: