Historical Context and Prophetic Command

Isaiah 20:1-2

In the year of the coming in of Tartan to Ashdod, when Sargon king of Asshur sendeth him, and he fighteth against Ashdod, and captureth it,

at that time spake Jehovah by the hand of Isaiah son of Amoz, saying, `Go, and thou hast loosed the sackcloth from off thy loins, and thy sandal thou dost draw from off thy foot,' and he doth so, going naked and barefoot.