'Barefoot' in the Bible

at that time the LORD spoke through Amoz's son Isaiah: "Go loosen the sackcloth that's around your waist, and take your sandals off your feet." So that's what he did: he went around naked and barefoot.

Then the LORD said, "Just as my servant Isaiah has walked around naked and barefoot for three years as a sign and a warning for Egypt and Ethiopia,

so the king of Assyria will lead away the Egyptian captives and exiles from Cush, both the young and the old, naked and barefoot with even their buttocks uncovered to the shame of Egypt.