Here God's name represents his character. It may represent specifically his power or his justice. AT: "Save me, God, by your power" (See: [[rc://en/ta/man/translate/figs-metonymy]])
# judge me in your might
Judging David here represents showing people that David is not guilty. When God uses his might to save David, people will know that God has judged him as not guilty. AT: "In your might, show people that I am not guilty" or "Show people that I am not guilty by using your power to rescue me" (See: [[rc://en/ta/man/translate/figs-metonymy]])