(Verse 7.) And you shall turn your face towards the siege of Jerusalem, and your arm shall be extended, and you shall prophesy against it. LXX: And you shall set your face towards the siege of Jerusalem, and you shall strengthen your arm, and you shall prophesy over it. Preparation of countenance is necessary, as well as strength, and the confirmation of the extended and exposed arm, so that not only by voice, but also by gesture and appearance of a prophet, the siege of the city may be demonstrated.
[AD 420] Jerome on Ezekiel 4:7