Isaiah 20:2-4

VIN(i) 2 At that time the LORD spoke through Isaiah son of Amoz. He said to him: "Take off the sackcloth from your body and the sandals from your feet." He did this and went around stripped and barefoot. 3 the LORD said: "Just as my servant Isaiah has gone stripped and barefoot for three years, as a sign and portent against Egypt and Cush, 4 so the king of Assyria will lead away stripped and barefoot the Egyptian captives and Cushite exiles, young and old, with buttocks bared to Egypt's shame.