Jamieson, Fausset & Brown

gird . . . loins--resolutely prepare for thy appointed task. Metaphor from the flowing robes worn in the East, which have to be girt up with a girdle, so as not to incommode one, when undertaking any active work (Job 38:3; Luk 12:35; Pe1 1:13). dismayed . . . confound--the same Hebrew word; literally, "to break." Be not dismayed at their faces (before them), lest I make thee dismayed before their faces (before them), that is, "lest I should permit thee to be overcome by them" (compare Jer 49:37).