Charles Ellicott Commentary Isaiah 11:5

"And righteousness shall be the girdle of his waist, and faithfulness the girdle of his loins." — Isaiah 11:5 (ASV)

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 in Isaiah’s style (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.