'Avenged' in the Bible

Now the men of Israel were hard-pressed on that day, for Saul had put the people under oath, saying, “Cursed be the man who eats food before evening, and until I have avenged myself on my enemies.” So none of the people tasted food.

this will not cause grief or a troubled heart to my lord, both by having shed blood without cause and by my lord having avenged himself. When the Lord deals well with my lord, then remember your maidservant.”