Meaning
Used figuratively of God and of earthly princes as the defenders of their people (Gen 15:1; Deut 33:29; Ps 33:20; 84:11). Faith is compared to a shield (Eph 6:16).
Shields were usually "anointed" (Isa 21:5), in order to preserve them, and at the same time make the missiles of the enemy glide off them more easily.