'Fighting' in the Bible

Now they are with Saul and all the men of Israel in the Valley of Elah, fighting with the Philistines.”

Then they told David, saying, “Behold, the Philistines are fighting against Keilah and are plundering (robbing) the threshing floors [of the grain].”

Please forgive the transgression of your maidservant; for the Lord will certainly make my lord a secure and enduring house, because my lord is fighting the battles of the Lord, and evil will not be found in you all your days.