Isaiah 20:1-2

In the year when the Tartan came to Ashdod, sent by Sargon, king of Assyria, and made war against it and took it; At that time the word of the Lord came to Isaiah, the son of Amoz, saying, Go, and take off your robe, and your shoes from your feet; and he did so, walking unclothed and without shoes on his feet.