Thematic Bible: Symbolically wears sackcloth, and walks barefoot as a sign to israel

At the same time spoke the LORD by Isaiah the son of Amoz, saying, Go, and loose the sackcloth from off thy loins, and put off thy shoe from thy foot. And he did so, walking naked and barefoot. And the LORD said, As my servant Isaiah hath walked naked and barefoot three years for a sign and wonder upon Egypt and upon Cush;