Thematic Bible: Symbolically wearing sackcloth and going barefoot

At that time, spake Yahweh, through Isaiah son of Amoz, saying, Go, and loose the sackcloth from off thy loins, And thy sandal, draw thou off from thy foot, - And he did so, walking disrobed and barefoot. Then said Yahweh, - As my servant Isaiah, hath walked, disrobed and barefoot three years as a sign and a wonder against Egypt and against Ethiopia,