O God the Lord. In the Hebrew, "Jehovah Adonai"—a comparatively rare address. The strength of my salvation. The solid strength upon which I ground all my hopes of salvation (comp. Psalms 89:26). Thou hast covered my head in the day of battle.
In past combats thou hast protected me, as with a shield (Psalms 18:2; Psalms 33:20), wherefore I put the greater trust in thee for the future. The "head" is mentioned as one of the chief vital parts.