Righteousness shall be the girdle of his loins... — The image of clothing as the symbol of habit or character was already familiar (Psalms 109:18-19). The repetition of “girdle” has needlessly offended some fastidious critics, but the emphasis of iteration is quite after Isaiah’s manner (Isaiah 15:8; Isaiah 16:7; Isaiah 17:12-13). It perhaps implies an upper and a lower girdle as the symbol of complete equipment. In the “loins girt about with truth” of Ephesians 6:14, we may probably trace an allusive reference. The armour of the followers of Christ was to be like that of Christ Himself.
Related Commentaries of Isaiah 11:5
Isaiah 11:5
5 And righteousness shall be the girdle of his loins, and faithfulness the girdle of his reins.