Luke 18:3

and there was a certain widow in that city; and she came to him, saying, Do me justice against my adversary.

Luke 18:7-8

And shall not God execute vengeance for his own elect, who cry out 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 evil. Wilt thou then not be afraid of the power? Do that which 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 shall not God execute vengeance for his own elect, who cry out 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 evil. Wilt thou then not be afraid of the power? Do that which is good, and thou shalt have praise from it: