'Barefoot' in the Bible

David went up by the ascent of the [Mount of] Olives, and wept as he went up; and he had his head covered, and went barefoot: and all the people who were with him covered every man his head, and they went up, weeping as they went up.

at that time Yahweh spoke by Isaiah the son of Amoz, saying, "Go, and loosen the sackcloth from off your waist, and take your shoes from off your feet." He did so, walking naked and barefoot.

Yahweh said, "As my servant Isaiah has walked naked and barefoot three years for a sign and a wonder concerning Egypt and concerning Ethiopia,

so the king of Assyria will lead away the captives of Egypt and the exiles of Ethiopia, young and old, naked and barefoot, and with buttocks uncovered, to the shame of Egypt.