Zechariah 13:7

Awake, O sword, against my Shepherd - This is generally understood of Jesus Christ. The sword is that of Divine justice which seemed to have been long asleep, and should long ago have struck either Man, or his Substitute, the Messiah. Jesus is here called God's Shepherd, because he had appointed him to feed and govern, as well as to save, the whole lost world. This is a prosopopoeia, and the address to the sword is very poetic. There is a fine passage in Aeschylus to the same effect: -

Ξενος δε κληροις επινωμᾳ,<-144 Χαλυβος Σκυθων αποικας,Κτεανων χρηματοδαιταςΠικρος, ωμοφρων σιδαρος,Χθονα ναιειν διαπηλαςὉποσαν αν και φθιμενοισι κατεχειν,Των μεγαλων πεδιων αμοιροιςπ ,

Aeschyl. Sept. cont. Hebrews 733.