Girdle: Figurative

Righteousness will be the belt around His hips, and faithfulness the sash around His waist.

I will clothe him with your robe and tie your sash around him. I will put your authority in his hand, and he will be a father to the dwellers of Jerusalem and to the house of Judah.

Stand firm then, with the belt of truth buckled around your waist, with the breastplate of righteousness arrayed,