'Power' in the Bible

During the war between the house of Saul and the house of David, Abner kept acquiring more power in the house of Saul.

Now take action, because the Lord has spoken concerning David: ‘Through My servant David I will save My people Israel from the power of the Philistines and the power of all Israel’s enemies.’”

As for me, even though I am the anointed king, I have little power today. These men, the sons of Zeruiah, are too fierce for me. May the Lord repay the evildoer according to his evil!”